PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 125 
Lineus viridis Ver., Am. Journ. Sci., vol. x, p. 40, 1875; Iny. V. 8., p. 628, 1874 (Ne- 
merics). 
Piles of wharves. 
Cerebratulus ingens (Leidy) Ver., Check List, p. 12, 1879; Inv. Y. 8., p. 630, 1874 
( Meckelia). 
Shore, in sand. 
Cerebratulus roseus (Leidy) Ver., Check List, p. 12, 1879; Inv. V. 8., p, 630, 1874 
(Meckelia). 
Shore, in sand. 
TURBELLARIA.* 
Planocera elliptica Gir., Proc. Bos. Soc. Nat. Hist., p. 251, 1850. 
Piles of wharves, and on the shore under bits of wood, &c. 
Bdelloura candida Gir. Ver., Iny. V.S., p. 634, 1874. 
Parasitic on Limulus Polyphemus. 
CEPHALOPODA. 
Ommastrephes illecebrosa (Les.) Ver., Inv. V. 8., p. 634, 1874.—0. sagitlatus Binney, 
in Gould, Inv. Mass., ed. II, p. 510, 1870. 
This species is caught in Provincetown Harbor during the summer 
and early fall in considerable numbers, to use for bait, and is often 
stranded upon the beaches at low tide. Prof. 8.1. Smith and Mr. Oscar 
Harger, while at Provincetown in 1872, noticed large numbers of this 
squid about the docks, killing and eating young mackerel. Their obser- 
vations on the habits and appearance of the creature made at that time 
are given in the report of the United States Fish Commission for 
187172, pp. 441, 442, 1874. 
Loligo Pealei Les. Binney, in Gould, Inv. Mass., II, p. 514,1870. Ver., Inv. V.S., p. 
635, 1874. 
This species was not encountered at Provincetown by the Fish Com- 
mission, but it is represented in the collection of Mr. J. H. Blake, of that 
place, by two pens taken from specimens caught in the harbor, in July, 
1879. Itis not abundant north of Cape Cod, although several speci- 
mens were procured at Annisquam, on the north side of Cape Ann, by 
Professor Hyatt, in 1878, and it has also been previously noticed from 
Massachusetts Bay. 
GASTEROPODA. 
Ilyanassa obsoleta (Say) Stimp. Ver., Inv. V. S., p. 641, 1874. Gould, Inv. Mass., 
II, p. 362, 1870 (Nassa). 
Very common on many of the inner beaches, and extending up to high- 
tide level. It is especially abundant in places where the brackish 
water from ponds runs down the face of the beach as it is left uncovered 
by the tide. 7 
* About six species of I?habdocela were collected, but they have not been determined. 
