vf a Tietv Irish Crustaceous Animal. 1 19 
Inferior antenna? bifurcate ; body elongate. 
Omethia . . 
CTyp e Cyclops rubens, Mill. 
(C. Castor, J urine.) 
Inferior antennae simple ; body ovate. 
Cyclops, Mill pyp^aO^n^rms Linn. 
J 1 l (G. vulgaris, Leach.) 
Superior antennae extremely long. Inferior very short. 
Calanus, Leach Type, C. Finmarchianus , Mid. 
Antenna? very short ; annuli gradually and moderately dimi- 
nishing in breadth. 
Annuli depressed ; body broad, flat. Eye distinctly double. 
Sapphirina , Tliomps Type, S.fulgens, Tilesius. 
Annuli subcylindric ; tail ending with two long setaceous 
styles. 
■.j . ,, f Type, C. minutus, Mul. 
Neostatnes < A, . , ,• \ 
l (G. staphylvnus, JJesm.) 
N. B. — Monoculus claviger and 71/. crassicornis require to be 
further examined. I have never met with any thing like 
them. 
That Anomaloccra is a type of the genus Cyclops will appear at 
once evident by comparing it with the characters which Jurine, 
Latreille, and others, have assigned to that genus, as anciently 
constituted, if we except the singular position of the eye, the 
number of the segments of the body (in which latter particular it 
however associates itself with C. rubens and C. minutus); and one 
or two minor points. It has four antenna? ; the superior long, 
setaceous, multiarticular, in the male with a swelling, confined 
universally in this species to the right side. The inferior antenna 
filiform, and ending with a dense pencil of hairs ; three sets of 
oral appendages and feet in pairs, attached to the successive pos- 
terior annuli of the body. The general form and the caudal 
appendages serve still more to confirm its affinity. From this 
species the genus Pontia, of M. Milne Edwards, leads to Ncbalia, 
approaching the one by the cephalic development, and the other 
by its general habit. From the description of the parts of the 
mouth given by the same author of a species of Ncbalia, I must 
imagine that considerable similarity can be traced between them 
and those I have described in Anomalocera. lie however applies 
theoretic considerations, and assigns to them names in their suc- 
cessive order, on the propriety of which my knowledge of the 
subject will not admit of my expressing an opinion. 
