HYALINA. 



31 



An European species introduced by commerce into some of the 

 Atlantic ports. It is common in damp cellars in Boston, and 

 has been noticed during the last year (1862) in Providence, 

 Salem, Lynn, Marblehead, Portland, Halifax Linsley includes 

 it in his List of Connecticut Shells. In 1864 it was 

 found at Astoria, Long Island, New York. *^^S- 32. 



The synonymy of the species is discussed in full by 

 Mr. Bland and myself (I. c). A fac-simile of Say's 

 figure of H. glaphyra is here given. giTpi^ra. 



Animal (see p. 29) : Upper surface light indigo blue, 

 darkest on the head, neck, and eye-peduncles, collar greenish, 

 eyes black ; foot narrow and slender, not much exceeding in 

 length the diameter of the shell, terminating 

 acutely. 



Jaw strongly arcuate, ends bluntly round- 

 ed ; centre of anterior surface slightly stri- 

 ate ; concave margin smooth, with a median 

 projection. 



Lingual membrane with 38 curving rows 

 of 17 — 1 — It teeth each; centrals long, 

 with three short obtuse cusps ; laterals four, bicuspid, inner cusp 



Fig. 34. 



Fig. 33. 



Jaw of yonnjf and old 

 Hyalina cellaria. [Mokse.] 



Lingual deatition of Hyalina cellaria. [Morse.] 



shorter; uncini thorn-shaped, curved, decreasing rapidly in size 

 as they pass off laterally. 



Hyalina nitida^ Muller. — Shell orbicular, depressed, moderately 

 convex above and concave below, thin, shining, uniform brownish horn- 

 color, with delicate striae of growth ; whirls five or more, convex, separated 



