PELTIDIUM. 163 
at the time of writing his work on the Copepoda. 
The only females, with ova, which I have seen were 
dredged in a depth of ten fathoms off the Durham 
coast. 
Dr. Claus’s description of the lower foot-jaw (‘ styl 
basali elongato non articulato’’) 1s scarcely correct, 
there being a very small joint intercalated just behind 
the hand. 
3. PELTIDIUM CRENULATUM, nov. sp. Pl. LXXII, fies. 
6-—15., 
Body subovate, broader in front than behind, in- 
cised at the junctions of the thoracic segments. 
Anterior antenne slender; first two joimts longest, 
third and fourth about half as long; next four very 
short; last about as long as the seventh and eighth 
together. Peduncle of the posterior foot-jaw (fig. 9) 
composed of two equal joints; hand subquadrate and 
marginally ciliated. The fifth foot in the female (fig. 
10) has three rather sharp and slender apical spines 
(one long and two short), together with two smaller 
spines on the inner edge near the apex; that of 
the male (fig. 11) has one large curved apical and 
four much smaller marginal spines, all of them very 
blunt; the first abdominal segment has also a strong 
spine at the outer angle (fig, 11 a); the inner angle of 
the peduncle is produced and crenulated (fig. 10 a). 
The produced angles of the abdominal segments in 
