MOLLUSCA. 13 



the spire fewer and larger, and the pillar lip is covered with many small transverse 

 ridges. 



31. Ranella pectinata, (Plate IV. fig. 17, 18.) Testa fusiformi, polita, einerea. ; varicibus 

 obliquis, spinis acutis niuricatis ; anfractibus lineis transversis elevatis instructis, inter varices tri-vel 

 quadrifariam tuberculatis ; apertura ovali, albida.; labro intus obsolete denticulato; labio interno 

 laevi, producto ; canali elongato, recto. 



Inhab. San Bias, Mexico. In seven fathoms, among mud. 



Family — FusacejE. 



Fusus. Lamarck. 



32. Fusus clausicaudatus, (Plate I. fig. 10, 11.) Testa, fusca, solida ; spira costata; costis 

 brevibus rotundatis ; anfractu ultimo et penultimo ecostato ; lineis transversis ordinatim exarata > 

 apertura parva, oblique ovali, coarctata, superne callositate ; canali subrecurvo, fere clauso. 



Inhab. L'Agulhas Bank, Cape of Good Hope. From a depth between fifty 

 and sixty fathoms, on a gravelly floor. 



The whorls of the spire are ribbed rather strongly, but the two last are 

 entirely without this character. The shell is particularly solid in its structure, 

 and is covered by regularly disposed impressed lines. The labrum is thickened 

 by the re-appearance of a rib, and which extends to nearly midway along the 

 canal. 



Cyrtultjs. Hinds. 



Qyrtulus, Hinds, Ann. Nat. Hist. v. 11. p. 256. 



Testa fusiformis ; anfractus ultimus et penultimus turbinatus ; spira per saltum ascendens ; 

 apertura linearis in canali brevi effuso desinens ; columella valde arcuata, superne callosa ; labrum 

 acutum ; umbilicus parvus ; epidermis laevis. 



33. Cyrtulus serotinus, Hinds, 1. c. p. 257, (Plate I. fig. 12, 13.) 



Inhab. Port Anna Maria, Nukuhiva, Marquesas. In nine fathoms, among 

 sand. 



This remarkable shell is not conveniently associated with any previously 

 established group. It perhaps most nearly approaches Pyrula melongena, P. 

 patula, and their allies, which we now rind to have been so erroneously placed in 

 Pyrula, and which must in future be removed to this family under a new generic 



E 



