376 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Cythereis emarginata Sars. 
PL 35, fig. 79-82. 
Cythereis emarginata Sars, ’66, p. 38; Dahl, ’88, p. 609, pi. 16, fig. 13-26, 30. 
Cythere emarginata Brady, ’68, p. 475; ’70, p. 450; Brady and Crosskey, ’71, 
pp. 61, 62; Brady, Crosskey, and Robertson, ’74, p. 166, pi. 5, fig. 1- 
6; Brady and Norman, ’89, p. 163, pi. 16, fig. 1-2. 
Specimens of this species were dredged alive from Buzzards Bay, 
“Phalarope” station 87, and from Vineyard Sound, “Fish Hawk” 
stations 7710, 7723, 7727, 7729. Specimens showed very consider¬ 
able differences in the depth of the sculpturing of the shell surface 
but in the abundance of the material the extremes were well bridged 
over. The figure represents nearly the extreme of the deeply im¬ 
pressed sculpturing. 
C. emarginata is a northern species, having been obtained within 
the Arctic circle. It is recorded by Brady (’70) from the Gulf of St. 
Lawrence, and by Brady and Crosskey (’71) from the post-Tertiary 
of Portland, Lewiston, and Saco, Maine. 
Cythereis tuberculata Sars. 
PI. 36, fig. 108-109. 
Cythereis tuberculata Sars, ’66, p. 37. 
Cythere tuberculata Brady, ’68, p. 406, pi. 30, fig. 25-41; ’70, p. 450; Brady, 
Crosskey, and Robertson, ’74, p. 164, pi. 5, fig. 7-12; Brady and Nor¬ 
man, ’89, p. 161. 
Cythere mutabilis Brady, ’66, p. 377, pi. 59, fig. 12-14. 
The shells of this species were obtained for the most part in the 
deeper and colder parts of Vineyard Sound, “Fish Hawk” stations 
7686, 7723. At the former station a single living individual was 
taken. 
The animal of this species has not been sufficiently studied and for 
this reason figures of the antennulae, antenna, and second leg are here 
given. 
This is a widely distributed species ranging from lat. 78° N. to the 
Mediterranean on the other side of the Atlantic. Brady (’70) records 
the species from the Gulf of St. Lawrence. Very probably this is 
