Of Th, 



(( UNIVI 



CALEDONIELLA, VELUTINA. 



UNIVERSITY 



lUFORN% 

 O. GRCENLANDICA, Bergh. PL 27, figs. 37, 38. 



Shell thin, flexible, subcorneous, with coarse irregular growth- 

 lines. 



Animal with verrucose mantle, color not described. 



Greenland. 

 Possibly = the foregoing species. 



0. CARNEA, Kroyer. PL 27, fig. 39. 



Shell more elongated than in the preceding species, with a 

 short wing-like production on the left side. 

 Animal with high, rounded mantle, verrucose. 



Greenland. 

 0. recondita, Kroyer, is the juvenile of this species. 



? Genus CALEDONIELLA, Souverbie, 1869. 



The animal has not been observed ; it is therefore somewhat 

 doubtful whether the genus really belongs in the Naticidse. 



C. MONTROUZIERI, Souverb. PL 27, fig. 40. 



Imperforate, heliciform, depressed, thin, fragile, finely striate, 

 the striae somewhat pliciform at the suture, translucent, white, 

 under a very thin shining yellowish epidermis ; whorls 3 to 3j, 

 suture narrowly channeled and margined ; extremities of the lip 

 joined by a parietal callus. Diam., 7 mill. 



New Caledonia. 



Genus YELUTINA, Fleming, 1822. 

 Y. L^EVIGATA, Pennant. PL 27, figs. 41-44, 48, 59. 



Shell thin, translucent, whitish, or usually light pink, with 

 numerous fine revolving striae crossing the minute growth-lines ; 

 epidermis thin, transparent horn-color, somewhat tufted on the 

 revolving striae ; whorls 3^, suture deeply impressed. 

 Length, 16 mill. 



Northern United States to Greenland, Northern 



Europe, Kamtschatka. 



Often credited to Linnaeus, but his Helix Isevigata may be 



regarded as a lost species. It is Bulla velutina, Miiller, V. halio- 



loidea, Fab. ; V. capuloidea, Blainv. ; V. striata, Mac-gill ; V. rupi- 



cola, Conr.; V. Mulleri, Desh. (figs. 44, 48), the latter a large 



5 



