TANAIS LORICATUS. 283 
The only specimen in the collection is imper- 
fect. The first segment of the pereion appears 
to be imperfectly fused with the cephalon; in- 
ferior antenne scarcely half the length of the 
superior. First pair of gnathopoda having the 
propodos ovate; dactylos short and tumid, shorter 
and less pointed than the digital process of the 
propodos. Pereiopoda having the first three 
joints short and broad, being affixed to the side 
of the pereion like plates of mail (hence the spe- 
cific name); they terminate in short pointed 
dactyli, and have the propodi armed with two 
lateral rows of strong black pointed teeth. 
This species was taken from the hollow of a 
sponge dredged in Esquimalt Harbour, at the 
depth of about ten fathoms. 
IONE CORNUTUS, N.S.—Mas: pleonem terminatum rotunde. 
The male differs from the description of the 
European species, chiefly in having the caudal 
extremity terminating obtusely, and in having 
shorter antenne. 
Foem., subequilateralis, lateralia cornua cephalonis habens recur- 
vata, pleopoda longa et arborea. / 
The female has the antero-lateral hornlike pro- 
cess of the cephalon curved posteriorly. The 
pereion is not quite equilaterally developed. The 
