CRUSTACEA. 
230 
In the three following subgenera, the second, third and fourth feet 
alone are terminated by a strongly curved nail, and the last eight 
are spinous. The eyes are usually but slightly convex ; they are 
large and converge anteriorly. 
.^GA, Leach. 
The two first joints of the superior antennae very broad and com- 
pressed, while in the two subsequent subgenera they are almost cy- 
lindrical 
Rocinela, Leach. 
The Rocinelae differ from the .SUgae, as just stated, in the form of 
the two first joints of their superior antetfinae, but otherwise approach 
them, as in their large eyes which approximate anteriorly f- The 
CoNiLiRA, Leach, 
Resembles Rocinela in the antennae ; but the eyes are smaller and 
distant, and the edges of the segments nearly straight and not falci- 
form nor prominent X. 
The last subgenus, among those of this section in which the an- 
tennae are placed on two lines, where the tail is composed of six 
segments, and the inferior antennae are always short, is distin- 
guished from all the preceding by strong and salient mandibles. 
It is the 
Synodus, Lat., 
A subgenus established on a single species §. 
In those that follow, the tail is usually composed of but five seg- 
ments. The length of the inferior antennae is more than the half of 
that of the body. 
CiROLANA, Leach, 
The tail composed of six segments |j. In the 
Nelocira, Leach. 
It consists of but five. The cornea of the eyes is smooth^. 
Eurydice, Leach. 
Similar to Nelocira in the number of caudal segments, but re- 
moved from it by the granulous eyes 
This subgenus leads us to those in which these organs are formed 
of granules or approximated simple eyes< and that also have the 
four antennae, composed of four joints at most, inserted on one hori- 
zontal line, and all the feet fitted for walking. The tail consists of 
* Desmar., Consid., p. 304, entaillee, XLYII, 4, 5. 
-f- Desmar., Consul., p. 304. 
* Desmar., Consul., p. 304. 
§ See Encyc. Method., article Si/nodus. 
jl Desmar., Consid., p. 303. 
Desmar., Consid., p. 302 ; Nelocire de Suainson, XLVIII, 2. 
** Desmar., Consid., p. 302. 
