HIGHER CRUSTACEA OF THE UL.M.B.C. DISTRICT. 73 
time. This, coupled with the amphibious habits of Ligia, 
seems to point to an aquatic origin. 
AMPHIPODA. 
Hyperia medusarum, Muller. 
Two large females with ova from lobster-pots. IY. 
Mr. Newstead says the eyes were brilliantly luminous. 
Hyale nilsonit, Rathke. 
A single female. I.a. 
Orchestia ganumarellus, Pallas. 
A male under a stone on grass close under Burton Rock, 
on the Dee, on 7th February. Another near Port Erin, 
“fully 500 yards from the shore” (T. L. Denson in lit.), 
*Lysvanax ceratinus,t n. sp. (Pl. X., figs. 1 to 8). 
Lateral lobes of the head prominent, subangular. 
First four epimera deeper than the corresponding dorsal 
segments, the first equal in width at the widest part to the 
two next together. Third pleon segment having the hinder 
angle rounded, but approaching to subangular. 
Eyes large, oval, dark, occupying the greater part of 
the head. 
UprER ANTENN2: First joint as long as the lateral lobe 
of head, upper and lower margins produced to a point, 
the lower rather the longer; second joint rather more 
than half as long as the first; third joint about half 
as long as the second. Flagellum eight-jointed, the last 
joint minute. Accessory appendage four-jointed, the first 
* It is possible that this may be the female of L. longicornis, Lucas, though 
it differs from the male of this species as described and figured by this author 
in not having the telson terminated by a rounded point, in the form and 
armature of the last uropods, and in the shape of the lateral cephalic lobe. 
From the same (?) species as figured by Bate and Westwood it differs in having 
no spines on the telson and no hairs on the last uropods, 
+ xeparivos, horny. 
