PELECYPODA. 29 



Pecten tryoni Dall, Bull. Mus. Comp. Zool., 1889, vol. 18, p. 438, 

 Chlamys (Aequipeden) glypta Verrill, Trans. Conn. Acad., 1897. 

 vol. 10,p. 76, pi. 16, figs. 7-11. 



Mass.— Off Marthas Vineyard, 85 to 120 fathoms. 



*Pecten (Plagioctenium) gibbus borealis Say. 



Ostrea gibba Linne, Syst. Nat., ed. 10, 1758, vol. 1, p. 698. 



Pecten borealis Say, Journ. Acad. Nat. Sci. Phila., 1822, ser. 1, 

 vol. 2, p. 260. " New England." 



Pecten irradians Gould, Inv. Mass., 1870, p. 199, fig. 496 (non 

 Lamarck). 



Pecten gibbus var. borealis Dall, Trans. Wagner Free Inst. Sci., 

 1898, vol. 3, pt. 4, p. 747. 



Mass. to Conn. — The common scallop of southern New Eng- 

 land. 



*Pecten (Placopecten) magellanicus (Gmelin). 



Dall, Trans. Wagner Free Inst. Sci., 1898, vol. 3, pt. 4, p. 726. 



Ostrea magellanica Gmelin, Syst. Nat., 1790, vol. 1, pt. 6, p. 3317. 

 " Freto Magellanico." 



Pecten tenuicostatus Mighels and Adams, Boston Journ. Nat. 

 Hist, 1842, vol. 4, p. 41, pi. 4, fig. 7. Gould, Inv. Mass., 1870, p. 

 196, fig. 494. 



Pecten fuscus Linsley, Amer. Journ. Sci., 1845, ser. 1, vol. 48, 

 p. 278. 



Pecten clintonius Verrill, Trans. Conn. Acad., 1884, vol. 6, p. 261 

 {non Say). 



Me. — Casco Bay, 4 to 10 fathoms; Frenchman's Bay, 3 to 10 

 ia thorns; Eastport. 



Mass. — Massachusetts Bay; Duxbury; Vineyard Sound- 

 ^Georges Bank, 45 fathoms. 



R. I.— Ofl^ Watch Hill; off Block Island; Point Judith. 



Conn. — Stonington from codfish. 



