40 



Pecten varius, Penn. — Ostraea varia, Lin. 

 On the scallop banks, but scarce. 



4. sinuosus. 



Pecten sinuosus, Tiirt. — Pecten pusio, Peiuu 

 — Pecten distortus, Mont. — Ostraea si- 

 nuosa, Lin — Hinnites pusio, Sow. 

 Test jun. . Pecten pusio. Tart. — P. spinosus, 

 Brown. 

 Common in deep water. Often found free in the 

 cavities of old shells, and is then regular in form, but 

 I have never observed a byssus. When young, it is 

 more elongated and generally regular, . constituting 

 the Pecten pusio of Turton. [Biv. Brit. t. 17) fig- 

 2.] I do not think the circumstance of its adhering 

 to stones and shells by one valve, a sufficient reason 

 for transferring it to the genus Hinnites, as Mr. 

 Sowerby has done. [See Zool. Journ. vol. 3.] 



5. obsoletus. 



Pecten obsoletus, Penn. — Ostrsea Iffivis, Mat. 

 and Rac. 

 Not unfrequent on all the coasts. It varies gi'eatly 

 in the presence, absence, and number of ribs. 



LIX. Lima, Bnipere. 



1. fragilisj (See Mag. of Nat. Hist. v. 8, p. 

 594, £ig. 65,) Lima fragilis, Fkni. — -L. bul- 

 latus, Turt. — Pecten fragilis, Mont. 

 The shell is translucent, very fragile, finely striated, 

 and closed, or nearly closed, on all sides. The ani- 

 mal has the filaments long, and of a pale crimson. 

 Not uncommon in deep water, where it is found in 



