114 
HISTORY OF BRITISH CRUSTACEA. 
unknown as British, but I have examined several specimens 
taken from the stomachs of fishes from the depth of fifteen 
or twenty fathoms. Some of these were of larger size than 
described from the Mediterranean ; one, not the largest, 
measuring three inches from snout to tail, with antennae of 
the length of five inches” (p. 79). 
Gen. 41. NIKA, Risso. 
First pair of legs dissimilar ; one on right side with two 
toes, one on left with one toe only. Beak very small. 
Inner antennae slender and ending in two long filaments. 
The outer jaw -feet are pediform, long, and stout. The 
fore legs are stronger than the following. 
This is the genus which Dr. Leach described under the 
name of Processa ; the first species is the Processa canalicu- 
lata of that author ; the name here adopted is prior to Dr. 
LeaclTs, and is given to it from the species being eaten on 
the coasts of the Mediterranean, as the Shrimp is eaten here. 
Nika edulis, Kisso. Risso’s Shrimp . — Two-toed hand 
longer than the wrist, both straight; middle plate of tail 
grooved down the middle, and furnished above with two 
pairs of small spines. It is about two inches long. 
