28 SHELLS OF NEW ENGLAND. 
PROSOBRANCHIATA. 
DENTALIADZ. 
DenTaLium sTRIoLATUM, St. Bost. Proc. Oct. 1851. 
D. entalis, Migh. (non L.) — Lamin. Corall. Casco 
Bay, (Migh.) Penobscot Bay,(Walden.) Eastport 
Harb. 10 f. mud, (W.8.) Off Grand Manan, in 40 
f. gravelly mud, (W. 8.) Off Isles of Shoals in 20 
f. sand, (Wh.) Mass. Bay, (Tufts.) It differs 
from the HKuropean species to which it has been re- 
ferred in being more slender, and in its frequent 
smoothness, — the striations being often difficult to 
detect. 
D. occiwentae, St. D. dentale, Gould, 155, f. 5. (non 
Auct.) — Deep water on the Coast of Maine, and 
in Mass. Bay. 
CHITONIDZE. 
CuHITON apicuLaTus, Say, Am. Conch. No. 8. C. pecti- 
natus, Gould, MS.— Laminarian. From Cape Cod 
southward. 
C. crnereus, Lin. C. marginatus, Penn. Gould, 147, 
f. 22.— Litt. Since the discovery of the specimen 
mentioned by Dr. Gould, no other has been found on 
our coast. 
C. ausus, Lin. Gould, 150, f.21. Middendorff, Malac. 
Rossic., i. 120. Forbes and Hanley, Brit. Moll., ii. 
405.— Litt. Lamin. Eastport at low water, (W. 8.) 
Isles of Shoals, (Wh.) to Cape Cod. 
