16 ZOOLOGY OF THE VOYAGE OF THE SULPHUR. 



Inhab. L'Agulhas Bank, Cape of Good Hope. Dredged from a depth of 

 forty-three fathoms. 



An interval is left between the ribs and the suture, which is smooth and 

 contracted. 



41. Pleurotoma gravis, Hinds, 1. c. p. 37, (Plate V. fig. 6.) Testa fusiformi, laevigata, cornea ; 

 anfractibus prope suturam angulatis, uniseriatim tuberculis parvis albidis cinctis, superne late planu- 

 latis ; anfractu ultimo coarctato ; apice papillari ; sutura simplici, fer& occulta ; canali brevi ; aper- 

 tura fusca. 



Inhab. L'Agulhas Bank, Cape of Good Hope ; in company with the 

 preceding. 



42. Pleurotoma biennis, Hinds, 1. c. p. 37, (Plate V. fig. 7.) Testa ovata., acuminata, 

 inermi ; anfractibus subrotundatis, flammeis undosis fuscis longitudinaliter ornatis, transversim 

 striatis ; sutura simplici ; apertura ovali ; canali brevi. 



Inhab. Bay of Magdalena, California. From seven fathoms, sandy mud. 



43. Pleurotoma violacea, Hinds, 1. c. p. 38, (Plate V. fig. 8.) Testa elongata, acuminata, 

 violacea ; anfractibus deceuis multicarinatis, longitudinaliter minutissime et creberrime striatis ; 

 carinis duabus eminentioribus ; labro tenui, acuto, crenulato; sinu laterali inter carinas; apertura 

 ovali ; columella biplicata. ; canali brevi. 



Inhab. North coast of New Guinea and Straits of Macassar. From seven 

 to twenty-two fathoms, sandy mud. 



The folds on the columella, for which this species is remarkable, are not to 

 be met with in all the specimens. 



44. PLErROTOMA radula, Hinds, I. c. p. 38, (Plate V. fig. 9.) Testa pyramidali, acuminata, 

 cornea; anfractibus nonis, lineis decussatis, uniseriatim tuberculatis ; tuberculis sublunatis; labro 

 tenui, acuto ; sinu laterali pone seriem tuberculorum ; sutura linea elevata. instructa; apertura ovali ; 

 canali brevi. 



Inhab. Straits of Malacca. In seventeen fathoms, mud. 

 The last whorl is elegantly granular both in the longitudinal and transverse 

 direction. 



Clavatula. Lamarck. 



45. Clavatula militaris, Hinds, Proceed. Zool. Soc. 1843, p. 38, (Plate V. fig. 10.) Testa 

 turrita, elongata, acuminata, albida ; anfractibus superne concavis et angulatis, plicis numerosis 

 longitudinalibus, granosis, lineis decussatis ; prope suturam carina subnodosa instructa. ; labro intus 

 laevi; apertura lineari, in canali brevi recurvo desinente. 



Inhab. Veragua, Central America ; in eighteen fathoms. Panama ; in 

 from eight to thirty fathoms, mud. 



