328 
CLASS CRUSTACEA. 
tail are in the form of setae, Nebalia Herbstii , Leach., Zool., 
Miscell. xlv. Desm. Consid. xl. 5 ; Rambcl. monoc. i. 8, 9 ? 
The nebalie ventrue of M. Risso, (Journ. de Phys. Octobre, 
1822) probably constitute in the section of the Schizopoda, 
a subgen us proper. In the cy clops exiliens of Viviani, the 
thorax is divided into several segments, which circumstance 
excludes it from the nebalise. It also forms a new subgenus, 
intermediate between the preceding and the following. 
There the thorax, or the testa, seen from above, is divided 
into five segments, the first of which, much the largest, sup- 
ports the antennae, the eyes, and the jaw-feet. The second and 
third have each a pair of feet ; the fourth supports the two 
following pairs, and the fifth the last. Their eyes are small, 
and not projecting, all the antennae are terminated by a simple 
filament. 
CONDYLURA, Lot; 
The lower antennae are much longer ; the anterior sides of 
the first segment are elongated into a point, and form two 
shells, or scales, approximating together like a bill ; the feet 
are terminated in a silky point. Some of the intermediate 
ones have, as in the Schizopoda, an external appendage near 
their base. The tail is narrow, composed of seven rings, the 
last of which, elongated and conical, advances between the 
two lateral appendages, which are slender, in the form of 
stylets, with two articulations, the last of which is setaceous. 
Condylure de Dorbigny , Lat., on the maritime coasts of La 
Rochelle. 
Nota. The genus Nicoihoe , of MM. Audouin, and Milne 
Edwards, on the supposition that it has mandibles and jaws, 
would belong to this section ; but as the crustaceous animal 
on which it has been established, is parasite, and as I think 
that I have perceived in it the vestiges of a sucker, I have 
