PHTLINE. 



453 



ing distribution beyond our seas, as at present known, 

 includes Nordland and Finmark, from 20 to 150 f. 

 (Loven and others), Greenland (Sars), and Massachu- 

 setts Bay (Stimpson). 



The young and fry are more globose than the adult ; 

 in the former the spire is proportionally smaller and 

 more depressed or umbilicate, and in the latter it is 

 rudimentary and consists of only half a whorl. The fry 

 is perfectly smooth and very glossy. In all these 

 respects the present species differs from P. angulata. 



It is the P. scutulum of Loven, and P. formosa of 

 Stimpson, the types of which I have examined. 



5. P. puncta'ta*, Clark. 



Bullosa punctata, Clark in Zool. Journ. iii. p. 339. P. punctata, F. & H. 

 iii. p. 547, pi. cxiv. e. f. 8, 9, and (animal) pi. ITU. f. 5, as B. punctata. 



Body oblong-oval, above dirty white, marked with the 

 finest longitudinal dark close lines, mixed with minute 

 streaks and points, giving the whole surface a dark eloud- 

 colonred sombre aspect [" tinged and speckled with reddish- 

 brown on a yellowish ground," F. & H., ex fig. Alder] ; hinder 

 part digitated or lobed, and yellowish-white [" Its capital disk 

 seems different in shape, and much shorter and broader than 

 that of catena, and the margin of the mantle is not laminated/' 

 F. & H.]; gizzard minute, cylindrical, and yellow. (Clark.) 



Shell oval, convex, but somewhat compressed in the 

 middle, of delicate texture, nearly transparent, and glossy : 

 sculpture, extremely numerous and close-set spiral rows of 

 minute rings or impressed circular dots, which are not united 

 or chain-like, but appear punctate ; edge of the mouth plain 

 at its base and slightly scalloped at the top of the outer lip : 

 colour as in all the foregoing species : spire very small, but pro- 

 minent: whorls 2, similar to those of the other species : suture 

 narrow, deep, and channelled : mouth regularly oval, rounded 

 at the base : outer lip llexuous, widely indented or slightly 

 concave in the middle ; the top lies somewhat below the spire ; 

 outer corner bluntly angulated, and projecting ; inner corner 



* Punctured ; not a classical word. 



