SHKLLS. 263 



the front valve not being rayed. I have dedicated this to my 

 young friend Dr. Joseph Hooker, the assistant -surgeon to H.M.S. 

 Erebus, in whose company Dr. Sinclair collected it. 



223. Chiton Sinclain. 



Inhabits New Zealand, Great Barrier Island. Dr. Sinclair. 



Pale brown, polished, the terminal valves with many, and the 

 lateral area with few indistinct broad nodulose ridges, the central 

 area polished, with pale longitudinal streaks, and with a few short, 

 deep, irregular longitudinal grooves on the hinder edge of the sides. 



This species is very like C. pellis serpentis, but is polished, 

 and the central plates are smooth, except at the outer angles. 



I have dedicated it to my friend Dr. Sinclair, of the Royal Navy, 

 who, during the passing of the list through the press, has pre- 

 sented to the British Museum a series of shells from New Zea- 

 land, which were collected during his stay in those islands in com- 

 pany with Capt. James Ross, of the Antarctic expedition. 



224. Zonites coma. 



Inhabits New Zealand. Dr. Sinclair. 

 Shell depressed, largely umbilicated, pale brown, whorls rounded, 

 with close, sharp-edged, elevated, concentric ridges ; spire nearly 

 flat, with broad brown, concentric bands, umbilicus conical, 

 showing the whorls ; mouth rather small, peristoma thin ; dia- 

 meter 3 lines. 



225. Melanopsis trifasciatus. 



Inhab. New Zealand, Bay of Islands, Waitanga Falls. 

 Shell ovate, thin, dark olive ; spire short, conical, about one- 

 third the length of the body whorl ; the last whorl with three 

 equidistant chestnut bands ; the callosity of the inner lip yellow. 



TUNICATA. 



226. Salpa costata. Quoy et Gaim. Voy. Uranie, 504, 

 t. 73, f. 2. Voy. Astrol. iii. 570, t. 86, f. 1-5. 



Inhab. 



227. Salpa infundibuliformis. Quoy et Gaim. Voy. 

 Uranie, 508, t. 7, f. 13. Voy. Astrol. iii. 587, t. 89, 

 6,7. 



Inhab. 



228. Ascidia erythrostoma. Quoy et Gaim. Voy. Astrol. 

 iii. 609, t. 91, f. 4, 5. 



Inhab. River Thames. 



