MUSEUM OF COMPARATIVE ZOOLOGY. 235 
A common deep-water species first found by the U.S. F. C. in 1883, ranging 
from east of George’s Bank to off Cape Hatteras, N. C., in 516 to 1,781 fathoms ; 
not living in less than 525 fathoms. 
Area pectunculoides Sc. 
VeERRILL, Trans. Conn. Acad., V. p. 573, pl. 44, fig. 6, 1882. 
Datu, this Bulletin, IX. p. 121, 1881; XII. p. 240, pl. 8, fig. 5, 1886; Bulletin 
U. S. Nat Mus., No. 37, p. 42, pl. 8, fig. 5, 1889. 
Twelve living specimens (six very large), Station 310, south of Martha's 
Vineyard, in 260 fathoms. Seven valves, Station 321, off Charleston, 8S. C., 
in 233 fathoms. 
An abundant species found by the U. S. F. C. from the Bay of Fundy 
and northwest of Flemish Cap to off Chesapeake Bay, in 11 to 965 fathoms. 
Recorded by Mr. Whiteaves from the Gulf of St. Lawrence, and by Mr. Dall 
from St. Vincent, in 292 to 1,568 fathoms; living in 292 fathoms. 
Macrodon asperula Datu? 
This Bulletin, IX. p. 120, 1881; XII. p. 244, pl. 8, figs. 4, 4a, 1886; Bulletin 
U. S. Nat. Mus., No. 37, p. 42, pl. 8, figs. 4, 4a, 1889. 
A right valve, Station 321, off Charleston, S. C., in 233 fathoms. 
The valve is very badly worn, and, although agreeing very closely with 
Mr. Dall’s description and figures, is referred to this species with some doubt. 
Extending south to the West Indies, in 310 to 1,568 fathoms, dead (Dall). 
Limopsis minuta (Pui1.). 
VERRILL, Trans. Conn. Acad., V. p. 576, 1882. 
Plate I. Fig. 8. 
One dead specimen, Station 307, east of George’s Bank, in 980 fathoms. 
Seven living specimens, Station 310, south of Martha’s Vineyard, in 260 
fathoms. Two valves, Station 321, off Charleston, S. C., in 233 fathoms. 
A very common species found by the U.S. F. C. from the east end of Ban- 
quereau to off Cape Hatteras, N. C., in 64 to 2,221 fathoms ; not living in less 
than 155 fathoms. 
Extending south to Grenada, in 30 to 850 fathoms; living in 30 fathoms 
(Dall). 
Pecten Clintonius Say. 
VERRILL, Trans. Conn. Acad., VI. p. 261, 1884. 
One valve, Station 333, off Cape Hatteras, N.C., in 65 fathoms. Five liv- 
ing specimens, Station 345, south of Martha’s Vineyard, in 71 fathoms. One 
