372 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
The species is found in Europe from Norway and Finmark south¬ 
ward into the Mediterranean. This is the first record for the western 
Atlantic coast. 
Genus Cythere O. F. Muller. 
This genus has been divided by later writers according to morpho¬ 
logical characters but as the soft parts were not present in the follow¬ 
ing species it is thought best to leave the species under the original 
genus until the soft parts are known. 
Cythere dawsoni Brady. 
PI. 35, fig. 84-85. 
Cythere dawsoni Brady, ’70, p. 453, pi. 19, fig. 8-10; Brady and Crosskey, *71, 
p. 64, pi. 2, fig. 5-7; Brady and Norman, ’89, p. 166, pi. 15, fig. 14-15. 
Several shells were found which seem to belong to this species 
although the original figures are incomplete in details. The shells 
were found in the deeper part of Vineyard Sound, “Fish Hawk” 
station 7723. The species is probably a northern one on our coast, 
and was described originally by Brady from the Gulf of St. Lawrence 
and found fossil by Brady and Crosskey at Portland, Maine, and at 
Montreal. 
Genus Cytheridea Bosquet. 
Cytheridea Bosquet, ’52, p. 37; Sars, ’66, p. 55; Brady, ’68, p. 421; ’80, p. 
Ill; G. W. Mtiller, ’94, p. 359. 
Shell smooth, sometimes slightly ornamented with raised papillae 
or impressed punctae, left valve usually the larger; antennulae 5- 
jointed, bearing short strong spines, end joint bearing but three setae; 
antennae 4-jointed, flagellum shorter in the female than in the male; 
mandibular palp 4-jointed, the next to the last joint at about the 
middle suddenly broadening on the dorsal border; from the outer 
angle thus formed springs a group of setae; branchial plate of maxilla 
without aberrant rays; in the male the first and second right and 
left feet differ, the second right foot being rudimentary, without a 
terminal claw. 
