Rev. T. R. R. Stebbing on Sessile-eyed Crustaceans. 35 
margin the elongated wrist is adorned with several transverse 
rows of adpressed sete. ‘There is one row away from the 
margin near to the junction of hand and wrist. The lower 
margin of the hand exhibits similar rows of sete ; the waved 
palm is set with cilia on both sides. In respect of this second 
pair of hands the Torbay specimens, with more or less varia- 
tion among themselves, differ all of them from that described 
by Mr. Spence Bate from Salcombe. The thumb-like pro- 
cess curves in towards the finger instead of out and away from 
it; its mmner edge is perfectly simple, without any of the 
semispiral grooving figured by the author just mentioned ; 
it has a quite blunt or truncate extremity, within which is 
inserted a strong, bent (or in some cases straight), movable 
spine. The length of the thumb seems to depend on the age 
of the animal, that specimen in which it is longest having 
other marks of advanced life upon it: thus, the wrist-process 
of the first gnathopods is very long, the finger-points of the 
second gnathopods are worn, and the penultimate joint of the 
lower antennz has the large dilatations before described. A 
specimen in my collection, unobservantly assigned to Aora 
gracilis till its true character was detected by the Rev. A. M. 
Norman, has an interesting peculiarity in this second pair of 
gnathopods. One is of the usual form; but the other has the 
palm nearly straight, not waved, without any thumb or ter- 
minal hinged spine. This is an approach to the character of 
the female. The gnathopods of the female differ very con- 
siderably from those of the male. The two pairs are very 
similar in general construction ; but the first are much the 
larger. In both, the hands are subequal to the wrists or a 
little larger. The hands and wrists are fringed on the lower 
margin asin the male. Both these joints are broad, and about 
twice as long as they are broad. ‘T'here js no process to the 
wrist, or thumb to the hand, but at the lower extremity of the 
palm a movable spine in both pairs of gnathopods. The finger 
1s internally serrate in each ; and that of the first gnathopods 
considerably overlaps the palm. 
There is on the whole a close resemblance between the 
female of this species, the female of Aora gracilis, and the 
female of Microdeuteropus anomalus as figured and described 
by Messrs. Bate and Westwood. 
The pereiopoda are alike in both sexes. The first two 
pairs have the metacarpus and wrist much broader than the 
hand; the hand narrows distally. In the three following 
pairs, of which the last is considerably the longest, the wrist 
is shorter than either -metacarpus or hand. At the extremity 
of the hand there is a long bunch of cilia. The telson, seen 
2% 
