V 
ZOOLOGY. 
CCXXXlll 
of being produced in a rostrum, readily distinguishes it from the pre- 
ceding species, and has been added to the specific character assigned by 
Dr. Leach, in, whose arrangement it was unnecessary, the formation of the 
head making part of the character of the genus. 
Talitrus Edvardsii. 
T. Rostro corniformi, antennis subaequalibus, corpore ovato depresso, cauda compressa tricarinata 
spinosa. 
Plate II, fig. I — 4. 
Brought up in the trawl on the western coast of Davis’ Strait; head 
produced in an acute depressed rostrum, slightly curving downwards. 
Body ovate, depressed, of seven imbricate segments, (the posterior being 
much larger than the others,) with small lateral lobes ; tail laterally 
compressed, the three anterior segments with large lateral lobes ; the 
caudal segments, and the sixth and seventh of the body tricarinate and 
spinous, each segment being posteriorly produced on each carina into a 
strong spine ; those of the tail being also furnished with an intermediate 
smaller spine on the middle carina© ; fourth and fifth caudal segments 
small, each furnished with a double style process ; the middle plate of the 
tail lanceolate, acute, bifid at the extremity, covering two style processes 
similar to the preceding ; eyes large, prominent, black, situated at the 
base of the superior antennae, having a small spine on the head between 
them ; legs fourteen, the four anterior with a compressed monodactyle 
hand ; the four next similar and equal, four-articulate, terminated by 
a curved nail and directed forward ; the three posterior pair similar, di- 
rected backward, the first and second pair being equal, and less than the 
third pair ; colour white, with deep red spots. 
In conformity with the arrangement which is followed in the present 
account, this species has been considered a Talitrus, as the inferior antenna© 
are somewhat longer than the superior; this character is, however, by no 
