PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 129 
Cumingia tellinoides Con. Gould, Iny. Mass., II, p. 79, 1870. Ver., Inv. V. S., p. 
679, 1874. 
Not found by the Fish Commission, but several dead shells were col- 
lected on the inner beaches by Mr. J. H. Blake, of Cambridge, and Dr. 
Crocker, of Provincetown. 
Angulus tener (Say) Adams. Ver., Inv. V.S., p. 677, 1874. Gould, Iny. Mass., II, 
p. 97, 1870 ( Tellina). 
Abundant on the shore, low water. 
Venus mercenaria Linné. Gould, Inv. Mass., II, p. 183, 1870. Ver., Inv. V. S., p. 
681, 1874. 
Rare on the beaches at Provincetown, but very common farther south 
on the inner shores of the cape, especially in the neighborhood of Well- 
fleet, where they attain a large size and have the purple coloration of 
the interior of the shell more than usually intense and widespread. 
Tottenia gemma (Totten) Perkins. Ver., Inv. V.S., p. 682, 1874. 
Very abundant on the beaches in company with Skenea planorbis and. 
Littorinella minuta, and also found amongst the eel-grass. The small 
dark-colored shells of this species are frequently scattered over the 
white beaches in the greatest profusion, appearing like coarse grains of 
black sand. But, being lighter than the sand, they are readily blown. 
along by the wind until they collect in large numbers in the lee of any 
prominence that may present itself, and in the furrows of the beaches. 
In such places as these several: handfuls of pure shells, with little: 
admixture of sand, may often be scooped up. The first specimens of 
this species obtained by General Totten, its earliest describer, were from 
the beach at Provincetown. 
Levicardium Mortoni (Con.) Perkins. Ver., Inv. V. S., p. 683, 1874. Gould, Iny. 
Mass., II, p. 143, 1870 (Liocardium). 
Low water, rare. 
Cryptodon Gouldii (Phil.) Adams. Gould, Inv. Mass., II, p. 100, 1870. Ver., Inv.. 
V.S., p. 686, 1874. 
Dead shells frequently found along the beaches; probably lives in 
shallow water close to the shore, but not dredged in Cape Cod Bay in 
less than thirteen fathoms, at which depth it was very abundant. 
Solemya velum Say. Gould, Iny. Mass., II, p. 48, 1870.—Solenomya velum Ver., 
Inv. V.S., p. 688, 1874. 
A few dead valves only were picked up on the inner beaches. 
Astarte castanea Say. Gould, Iny. Mass., II, p. 117, 1870. Ver., Inv. V. S., p. 685, 
1874, : 
Found abundantly in Provincetown Harbor, west and north of the 
light-house, at low-water mark (Gould). Although searched for at this 
locality in 1879, no specimens were discovered ; a very low tide is prob- 
ably required to uncover them. Mr. J. H. Blake says they are also. 
common low down on the inner shore, near Wood End Light. 
Proc. Nat. Mus. 80-———9 July 2, 1880. 
