236 BULLETIN OF THE 
Gexus MODIOLARIA Becx. 
Modiolaria lateralis Say. 
Modiolaria sp. indet., Dall, Bull. M. C. Z., IX. p. 117. 
Mytilus lateralis Say, Journ. Acad. Nat. Sci. Phil., II. p. 264, 1822. 
Plate VI. Figs. 7%, 8. 
Habitat. West Florida, 30 fms., living. East coast of the United States, 
from Florida nearly to Cape Hatteras, at various depths, but mostly in compara- 
tively shallow water. 
Another southern species of Modiolaria, but which is not reported from our 
coasts as far as the books indicate, is M. lignea Reeve, which I have received 
from C. W. Johnson, of St. Augustine, and from Charles T. Simpson, who col- 
lected it at Tampa, thus occurring on both coasts of the peninsula. It is nota- 
ble for having no radiating striz, and for its rich chestnut-color, bluish black 
on the umbones and toward the margins. It grows over an inch in length 
and spins a fibrous nest. M. cinnamomea Chemn. is another Florida species 
which almost or quite reaches the latitude of Cape Hatteras. 
Famity ARCIDZE. 
Genus LIMOPSIS Sassy. 
Limopsis minuta Puiiprt. 
Limopsis minuta Philippi, Dall, Bull. M. C. Z., TX. p. 119. 
Habitat. Gulf of Mexico, west of Florida, 30 fms.; Station 36, 84 fms. ; 
Barbados, 100 fms.; Bache, April 22, 1872, Lat. 21° 14’ N., 100 fms.; Sigsbee, 
off Cuba, 119 fms.; Station 20, 220 fms.; off Morro Light, 292 fms.; Station 
19, 310 fms. ; Sigsbee, off Havana, 450 fms.; Yucatan Strait, 640 fms.; Sta- 
tion 2, 805 fms.; Station 253, near Grenada, in 92 fms. 
This species is named minuta on the authority of Dr. Jeffreys, it having 
been impracticable for the writer to compare with the various fossil forms of 
south Europe. It seems to agree sufficiently well with the material I have 
been able to examine, and which has been named minuta by other naturalists, 
Limopsis tenella Jmrrreyrs. 
Limopsis tenella Jeffreys, Dall, Bull. M. C. Z., IX. p. 118. 
Habitat. Station 44, 539 fms.; Station 41, 860 fms.; Station 56, 888 fms.; 
Station 33, 1568 fms, 
