SOME BLIND GENERA 825 
with eyes well developed, and the first and second antenne 
four-jointed apparently in the male as well as in the 
female. The male is thought to be distinguished chiefly 
by a more elongate pleon. ‘The single species is repre- 
sented by one small specimen supposed to come from 
2,050 fathoms in Mid Pacific, and other specimens from 
between 2 and 10 fathoms at Port Jackson mm Australia. 
Tanaella, Norman and Stebbing, 1886, has no eyes 
and no distinct ocular lobes. There are no pleopods in 
the female, and the uropods are simple, the single branch 
being also single-jointed. ‘The male is unknown. 
Strongylara, Sars, 1880, has no eyes and no distinct 
ocular lobes. The mandibles have the molar moderately 
large, laminar. There are no pleopods in the female. In 
the uropods the inner branch is two-jointed, the outer 
one-jointed. 
Cryptocépe, Sars, 1880, like several of the preceding 
yenera is without eyes. ‘lhe mandibles have the molar 
sublaminar, unarmed, and on the right hand mandible 
there is a very prominent secondary plate. The segments 
of the perzeon are divided by deep instrictions. The pleo- 
pods are well developed in the male, rudimentary in the 
female. The uropods in the male are long, with three- 
jointed inner, and two-jointed outer, branch; in the 
female short, with two-jointed inner, and one-jointed outer, 
branch. 
Haplocépe, Sars, 1880, agrees nearly with the preced- 
ing genus, except that the mandibles have a cylindrical 
molar, of which the truncate apex is encircled with teeth, 
and the uropods are moderately long with unequal two- 
jointed branches. 
Anarthrira, Sars, 1880, is distinguished from all the 
foregoing genera by having ‘the pleon unsegmented. There 
are no eyes. ‘The hands of the first gnathopods are weak. 
There are no pleopods. In the uropods the outer branch 
is represented by a conical process not disunited from the 
peduncle, the inner branch is two-jointed. 
Among the earlier authorities on this family the writ- 
ings of Kroyer, Lilljeborg, and Fritz Miiller may be men- 
