Narrative of the surveying voyages of His Majesty's ships Adventure and Beagle Part 56

_A. testa diaphana, subalbida, creberrime transversim substriata, strigis longitudinalibus castaneis raris; anfractu basali subangulato; long. 11/16 paulo plus; lat. 6/16 paulo minus; poll._

_Habitat in paludibus Brasiliae_ (Santo Paulo). _Mus. nost._

38. ACHATINA SORDIDA.--No. 798 MSS.

_A. testa subdiaphana, subconica, anfractu basali ventricoso; long. 6/8 paulo plus; lat. 3/8 paulo plus; poll._

_Habitat ad Brasiliam_ (Rio de Janeiro). _Mus. nost._

39. ACHATINA SELLOVII.

_A. testa cylindracea transversim striata subdiaphana; long. 5/16; lat.

2/16; poll._

_Habitat ad Brasiliam_ (St. Catherine). _Mus. Brit., nost., Brod._

This sh.e.l.l, which I found at the city of Nossa Sen^a. de Estero, {555} I have dedicated to my friend, Dr. Sellow, whose researches in Natural History for several years past in the interior of Brazil, are well known to the scientific world.

40. SUCCINEA FRAGILIS.

_S. testa ovato-acuta, diaphana, ventricosa, transversim striata, oblique subrugosa; spira brevi; long. 9/16 paulo minus; lat. 6/16; poll._

_Habitat ad insulam_ Juan Fernandez. _Mus. Brit., nost., Brod._

41. SUCCINEA PATULA.

_S. testa diaphana, ovato-rotundata, ventricosissima, transversim creberrime striata; spira brevissima; apertura patula; long. 4/8 paulo plus; lat. 3/8 paulo plus; poll._

_Habitat ad insulam_ Juan Fernandez.

MARINULA. _Nov. Genus._

_Character Genericus._

_Testa ovato-producta, sub-solida; apertura ovata, integra; columella bidentata, et basin versus uniplicata; dentibus magnis sub-remotis conniventibus, superiore maximo; operculum nullum._

42. MARINULA PEPITA.

_M. testa ovato-producta, viridi-fusca; anfractibus sub-tumidis; spira brevi; apertura nigricante; dentibus plicaque albidis; long. 7/16; lat.

4/16; poll._

_Habitat ad insulam_ Chiloe. _Mus. Brit., nost., Brod., G. Sowerby_.

This animal, which I have thought it necessary to a.s.sign to a new genus, appears to have for its nearest neighbours the genera Auricula and Pedipes.

It was found on the wooden piles which support the mole in the Bay of San Carlos, in Chiloe, below the wash of the high water. The mole stands out into the sea, and there is no fresh water near it, save a very little rill, which discharges its tiny stream more than fifty yards off.

43. LYMNaeA DIAPHANA.--No. 349 MSS.

_L. testa turrita, transversim substriata, anfractibus ventricosis; long. 11/16; paulo plus; lat. 5/16; poll._

_Habitat ad fretum Magellanic.u.m_ (Cape Gregory). _Mus. Brit., nost., Brod._

This sh.e.l.l was found in the fresh-water ponds in the neighbourhood of Cape Gregory, which is on the continental side of the eastern end of the Strait of Magalhaens. {556}

44. AMPULLARIA c.u.mINGII.

_A. testa globosa, transversim striata, subalbida, longitudinaliter castaneo-lineata et fasciata, epidermide virescente; umbilico parvo; lat. 1-7/16; long. 1-6/16; poll._

_Habitat in Sinu Panamae_; (island of Saboga, in a small hill-stream). _Mus.

Brit, nost., Brod._

From Mr. c.u.ming's collection. I have named this sh.e.l.l after Mr. c.u.ming, from whom I received it.

45. NATICA GLOBOSA.

_N. testa globosa, tenui, ventricosissima, cornea, vel subalbida, subtilissime striata; spira brevi; umbilico parvo; operculo valde tenui; long. 15/16 paulo plus; lat. 7/8; poll._

_Habitat ad fretum Magellanic.u.m_ (Cape Gregory). _Mus. Brit., nost., Brod._

46. NATICA CASTANEA.

_N. testa ovato-acuta castanea, albo-lineata; apertura mediocri; columella valde callosa; umbilico mediocri; long. 13/16; lat. 21/32; poll._

_Habitat ad Brasiliae; oras, circa_ Santos. _Mus. nost._

47. TURBO LUGUBRIS.

_T. testa nigricante, striata; apertura argentea; labri margine nigra, subcrenulata; operculo valde lapidoso, albo; long. 2-1/8; lat. 2-2/8 fere; poll._

_Habitat ad Sinum_ Penas. _Mus. Brit., nost., Brod._

48. ODONTIS SUBPLICATA.

_O. testa granuloso-striata, viridi-fusca, nigro maculata; umbilico mediocri; labri margine sub-plicato; long. 10/16; lat. 13/16 paulo plus; poll._

_Habitat ad Brasiliam_ (Rio de Janeiro). _Mus. Brit., nost._

49. LITTORINA FLAVA.

_L. testa longitudinaliter striata, sub-flava; spira brevi; anfractu basali ventricoso; columellae purpurascentis margine et apertura sub-flava; operculo nigricante; long. 5/8 paulo plus; lat. 7/16 poll._

_Habitat ad Brasiliam_ (Rio de Janeiro). _Mus. Brit., nost._

In young sh.e.l.ls there are a few obscure reddish brown streaks crossing the striae.

50. LITTORINA PERDIX.

_L. testa striis elevatis balteata, albida, fusco-maculata, striis interst.i.tialibus minus elevatis, ambabus sub-cancellatis; apertura alba, {557} labri margine tenui, castaneo-maculata; long. 13/16; lat.

17/32 poll._