810 MR. E. A. SMITH ON MARINE SHELLS [Nov. 5, 



Besides the two or three " plaits, " which perhaps should rather he 

 termed elongate tubercles, at the base of the columella, there is a 

 small one at the upper part, usually present in most species of Nassa. 



N. trinodosa of Smith has the same nodulation on the last whorl, 

 but, however, is quite distiuct from this species. It differs in colour, 

 has fewer longitudinal costse, which are less granulous ; and the spiral 

 thread-like lirse which cross them are fewer and less prominent. 



A T . subspinosa of Lamarck is another allied species of much the 

 same form, and having the same character of sculpture ; only the 

 nodules are much more prominent and the ribs less numerous. 



27. Nassa (Arcularia) granifera, Kiener, Coq. Viv. pi. 27. 

 fig. Ill; Reeve, Conch. Ic. viii. fig. 72. 



Hab. Philippines (Reeve). 



28. Nassa (Arcularia) bimaculosa, A. Ad. P. Z. S. 1851, 

 p. 102; Reeve, Conch. Icon. viii. sp. 61. 



Hab. Philippines (Cuming) ; "Andaman Islands, on sand banks 

 at low tide ; very active animal" (Wilmer). 



29. Nassa (Arcularia) callospira, A. Ad. P. Z. S. 1851, p. 

 102 ; Reeve, Conch. Icon. viii. figs. 66 a, b ; G. and H. Nevill, Journ. 

 Asiatic Soc. Bengal, 1874, vol. xliii. pt. 2, pi. figs. 5, 5 a. 



Hab. Andaman Islands (Nevill and Wilmsr) ; Philippines (Cu- 

 miny). 



On comparing an Andaman specimen with the type of the species, 

 I do not hesitate for a moment with regard to its identity. 



30. Nassa horrida Dunker. 



Buccinum horridum, Dkr., Philippi's Abbild. ueuer Conch, iii. pi. 

 2. fig. 8. 



Nassa horrida, Dkr., Reeve, Conch. Icon. viii. figs. 69 a, b. 



N. curta, Gould, Otia, p. 69 ; Atlas, Wilkes's Explor. Exped. pi. 

 19. figs. 326 a, b. 



Hab. Samoa Islands (Gould). 



31. Nassa echinata, A. Adams, P. Z. S. 1851, p. 101 ; Reeve, 

 Conch. Icon. viii. fig. 131. (Plate L. fig. 9.) 



Hab. Philippines. 



The Andaman specimens are all shorter than the type, which is 

 figured by Reeve ; and not one of them has the fifth or lowermost series 

 of nodules on the body-whorl, which is very closely approximated to 

 the fourth row. In other respects they agree perfectly with the typical 

 shells said to have been found at the Philippine Islands. This species 

 is allied to N. mnricata of Quoy and Gaimard, yet is perfectly distinct. 

 It differs from that species in being almost quite smooth in the inter- 

 stices between the nodules, there being only the faintest indication of 

 spiral striae in some specimens. The aperture, too, is less elongate, 

 and the margin of the basal canal is stained with dark brown. This 



