350 
CLASS CRUSTACEA. 
side of the head. The body is naked, without testa, and annu- 
lated in its entire length. The females carry their eggs in a 
capsule, situated towards the base of the tail, in those in which 
the body thus terminates, or at the posterior extremity of the 
body, or of the thorax, in those which have no tail. 
These have a tail. 
Artemta, Leach , 
Whose eyes are supported on very short pedicles ; the head 
is confounded with an oval thorax, supporting ten pair of feet, 
and terminated by a long and pointed tail. The antenna; are 
short and subulate. 
Artemia Salma, Cancer . Salinus ., Lin., Montag., Linn., 
Trans. XT. xiv. 8 — 10.; Gammarus Salinus , Fab., Desmar., 
Consid., pag. 393, is a very small crustaceous animal, com- 
monly found in the saline marshes of Lymington, in England, 
when the evaporation of the waters is very much advanced, 
but concerning which, we have, as yet, but very imperfect 
information. 
Branchipus, Lat . Chirocephalus, Benedict Prevost , 
J urine. 
Have the eyes supported on very projecting pedicles, the body 
narrow, elongated, and compressed; the head distinct from 
the trunk, variously appendaged, according to the sexes, with 
two projections in the form of horns between the eyes ; 
eleven pairs of feet, and the tail terminated by two leaflets, 
more or less elongated, and edged with cilia?. 
Although Schaeffer, and Benedict Prevost, have given very 
detailed monographs on two species of this genus, their 
labours are, nevertheless, still very imperfect, as to the com- 
plete and comparative knowledge of the buccal organization, 
and of some other parts of the head. Considered in the two 
sexes, these animals present us with the following generalities: 
