DALL: MOLLUSCA AND BRACHIOPODA. 421 
U.S. S. “ Albatross,” station 4642, Galapagos Islands, four miles 8. 41° E. 
from Ripple Point, Hood Island, in 300 fathoms, broken shell, bottom tempera- 
ture 48°.6 F. U.S. N. Mus. 110,581. 
This very distinct little species has an unusually lively color for a shell from 
such a depth. 
Amgulus MEGERLE. 
Tellina (Angulus) carpenteri Datu. 
Tellina (Angulus) variegata Carpenter, 1864, not Tellina (Angulus) variegata Gmelin, 
1791. 
Tellina (Angulus) carpentert Dall, Proc. U. S. Nat. Mus., 1900, 23, p. 308. 
U. S. S. “ Albatross,” station 3355, Gulf of Panama, in 182 fathoms, mud, 
bottom temperature, 54°.1 F. U.S.N. Mus. 122,934. 
It was most unexpected to find this species, common in shallow water on the 
coast of California, so far south, but it must be observed that the temperature of 
the water at the depth stated above, in 182 fathoms, is almost exactly that of the 
shallow waters of Alta California. Though only a single valve was obtained, the 
identity of the Panama specimen is not doubtful. 
MACONMA Leacu. 
Macoma inornata Han ey. 
Tellina inornata Hanley, P. Z. 8. London, 1844, p. 144; Thes. Conch., 1847, 1, 
Tellina, p. 815, pl. 59, fig. 128. (Not Tellina inornata Hupé in Gay, Hist. de 
Chile, 1854, 8, p. 356, pl. 8, fig. 2.) 
Tomé, Chile, brought up by the anchor of the “‘ Albatross,” from about 14 
fathoms ; young valves. U.S. N. Mus. 110,717. 
The shell figured by Hupé under the name of 7. inornata is clearly distinct from 
that originally so named by Hanley, being an entirely different and much more 
triangular shape. As the former does not appear to have been described, I pro- 
pose for it the name of Macoma hupeana. It recalls M. inquinata Deshayes, but 
is even shorter,, higher, and more triangular. 
Psammacoma Datt. 
4 
Macoma (Psammacoma) hesperus Datt, n. sp. 
Shell yellowish white with occasional brownish, narrow, concentric zones and a 
pale yellowish flush internally ; valves inequilateral, the posterior end shorter, the 
profile being an elongate oval; beak low, rather pointed, small; anterior dorsal 
margin nearly straight, gently descending, the anterior end evenly rounded into 
