CALEDONIELLA, VELUTINA, 65 



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



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

 lines. 



Animal with verrucose mantle, color not described. 



Greenland. 

 Possibly = the foregoing species. 



0. CABNEA, Krojer. PI. 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, Kroj'er, 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, finel}"- striate, 

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

 under a xQvy thin shining yellowish epidermis; whorls 3 to 3^, 

 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^viGATA, 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 strife ; whorls 3i, suture deepl}' impressed. ^ 



Length, 16 mill. 



Northern United States to Greenland, Northern 



Eurojye, Kamtschatka. 



Often credited to Linnaeus, but his Helix laevigata may be 

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

 Zoirfea, Fab. ; V. capuloidea^'BWnw.; V. striata, 'Macgill; V.rupi- 

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



