110 



-* M. PELLUCIDUS. Pen. 4.^?. 237. t. 66. f. 3. Mont. 

 p. 160. Dow. 3. t. 81. Lin. T. p. 167. D.p. 310, 

 Turt.D.p. llQ.Ch. f. 751. Far EDTJLIS. F. 

 p. 411. Oval, transparent, usuall} yellowish with dark 

 blue rays, broader than the last, anteriorly straight ; 

 only two or three tubercular teeth under the hinge. 2. 

 Common. 



f MY. STRIATULUS. Lin. Mant. p. 548. Schrtet. 

 Ein. t. 9./. 16. Gmel. 3358. Turt. in Mag. N. H. 

 7. -Semitransparent, dark horn-colored, with a few 

 paler zones, marked with numerous slight longitudinal 

 ribs decussated by transverse depressed lines giving 

 them a granulated appearance; front margin a little 

 incurved, hinge margin angular. Scarborough. 



* The Crenatus and Ungulatus are occasionly found 

 on our coast but are not native species. 



f Contrary to my usual habit, I have copied the 

 synomyms without verifying them, since I am unable 

 to procure the described shell. In almost every other 

 case reliance may be placed on the foreign synonyms, 

 as much labor has been expended in the comparison of 

 figures. 



