FAMILY SPH ROMIDA. 188 
The body is much depressed, similar in both sexes; an adult 
female measures 4°5 mm. in length and 2°8 mm. in breadth, 
broadest at the end of thorax; the largest females are a little 
larger than the males. Third joint of antennule is very slender, 
as long as the sum of the two proximal joints. Prehensile 
hand of first thoracic legs large, oblong-oval, in the male a 
little longer and narrower than in the female ; prehensile hand 
of second legs in the male very much smaller than that of first 
pair, but rather similar in shape; the “claw” as long as the 
hand. Last abdominal segmenttriangular, at the base less broad 
than the broad but very short anterior part of abdomen ; the 
upper side of the last segment with a raised semicircular ridge 
sub-parallel with the lateral margin and at the mesial line a 
little longer from the end than from the anterior margin ; 
parallel with and rather near the whole lateral and posterior 
margin a sublinear impression is found; the margin itself is 
finely serrate. Exp. of urp. reaches slightly beyond the 
abdomen; it is rather narrow, flat, especially on its outer 
margin finely serrate; the end is bifid, its inner process 
several times smaller than the outer. 
(12) Tecticeps (Richardson).—The type is T.alaskensis 
(Richardson) ; a few years after the same author established 
a second species, T’. convexus. The U.S. National Museum 
has favoured me with several specimens from the same locality 
(“ Albatross,” Stat.3307), labelled T.alaskensis. Atacloser 
examination the majority turned out to be males, but two of 
them adult females. In the male second thoracic legs ter- 
minate in a rather small prehensile hand; the sixth joint 
(“ propodus ”) is oblong, with a short process on the lower 
side at the broader base; seventh joint, which is adduced 
along the lower margin of the sixth, is rather considerably 
longer than the latter and besides sinuate; sixth joint of 
seventh thoracic legs is considerably longer and thicker than 
the corresponding joint of sixth legs, and its proximal half is 
somewhat curved; the end of abdomen is acute and exp. of 
urp. considerably longer than endp. In the female. second 
legs are simple as third pair; sixth joint of seventh legs is 
