PELECYPODA. 35 



Me. — Common from Casco Bay to Eastport in 3 to 60 fathoms . 

 Mass. — Marblehead, 7 fathoms; Buzzards Bay and Vineyard 

 Somid, 5 to 15 fathoms. 



R. I.— Off Block Island, 29 fathoms. 



Conn. — Stonington (Linsley) ; off New London. 



Crenella pectinula (Gould). 



Gould, Inv. Mass., 1870, p. 195, fig. 493. 



Modiola pectinula Gould, Inv. Mass., 1841, p. 127, fig. 85. " St. 

 George's Bank." 



Georges Bank. 



*Crenella decussata (Montagu). 



VerriU, Trans. Conn. Acad., 1882, vol. 5, p. 578, pi. 44, fig. 7. 

 Mytilus decussatus Montagu, Test. Brit., Suppl., 1803, p. 69. 



" SCOTISH COAST." 



Me. — Casco Bay, 10 to 20 fathoms; Frenchman's Bay, 10 to 

 28 fathoms; Eastport, 4 to 40 fathoms. 



N. H.— Off Isles of Shoals, 20 fathoms. 



Mass. — Provincetown ; off Marthas Vineyard, 64 to 115 fath- 

 oms; Duxbury. 



Conn. — Stonington (Linsley). 



ANOMALODESMACEA. 



PHOLADOMYACIDAE. 



Aporema arata (Verrill and Smith). 



Dall, Trans. Wagner Free Inst. Sci., 1903, vol. 3, pt. 6, p. 1532. 



Pholadomya arata Verrill and Smith in Verrill, Amer. Joum. 

 Sci., 1881, ser. 3, vol. 22, p. 301. [off Marthas Vineyard.] 

 Verrill, Trans. Conn. Acad., 1882, vol. 5, p. 567, pi. 58, fig. 37. 



Mass. — South of Marthas Vineyard, 69 to 130 fathoms. 



