366 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
The mandibular foot of the female (pi. 28, fig. 18) seems to lack 
the setae of the frontal side of the second joint found in the male but 
has much more numerous and smaller spines on the posterior side 
of this joint. 
Habitat .— Both males and females of this species were collected 
by the writer from among eel grass and hydroids (Pennaria tiarella), 
to which they clung. These were from the channel across from 
Wood’s Hole harbor, known locally as the “Gulf of Canso.” August 
3, 1905. 
In the character of the shell surface this in certain points resembles 
the preceding species, but that species is very much larger, spinose 
on the border, and different in the minor structural details of the ap¬ 
pendages. S. zostericola resembles very closely the species described 
by Brady and Norman as Nematoliamma obliqua from British waters. 
It differs from it, however, in the ornamentation of the surface and in 
the minor structural characters of the appendages. 
Genus Cylindroleberis Brady. 
Cypridina, of authors. 
Asterope Philippi, ’40, p. 186; Claus, ’76, p. 94; Sars, ’87, p. 11; G. W. Muller, 
’90, p. 238; Brady and Norman, ’96, p. 629. 
Cylindroleberis Brady, ’68a, p. 127; ’68, p. 464; G. W. Mtiller, ’94, p. 216. 
Shell oblong or elliptical, polished and smooth; sensory organ of 
male on antepenultimate joint of antennula, a large stout annulated 
seta densely clothed with fine hairs; last joint of antennula in male 
3-jointed, ending in a recurved claw; mandibular foot with a masti¬ 
cating process at the base. 
Cylindroleberis mariae (Baird). 
PI. 29, fig. 19-25. 
Cypridina mariae Baird, ’50, p. 257, pi. 17, fig. 5-7. 
Cylindroleberis mariae Brady, ’68, p. 465, pi. 33, fig. 18-22; pi. 41, fig. 1 a-h. 
Asterope mariae Brady and Norman, ’96, p. 630, pi. 50, fig. 1-6; pi. 51, fig. 
11-22; pi. 53, fig. 10-15. 
Cypridina oblonga Griibe, ’59, p. 322, pi. 12. 
