210 LIVERPOOL BIOLOGICAL SOCIETY. - Be! 
Uropops: The three pair extend about equally back- 
wards; in the first the peduncle is slightly longer, in the 
second shorter, and in the third much longer than the 
rami. ‘The peduncle of the third has three short spines 
on its upper margin, and five or six at the distal end. The 
outer ramus is longer than the inner, straight, smooth and 
tapering, terminated by a minute nail; the inner is curved, 
minutely denticulate on the concave side, with a comb-like 
process of five or six somewhat larger teeth overlapping 
the nail. 
TELSON convex, triangular, with curved sides and rounded 
apex; a pair of upright spines on each side of a median 
line, somewhat nearer the apex than the base. 
The specific name is derived from ices equal, ods foot, 
referring to the equality between the first and second 
enathopods, which is unusual in the genus Podocerus. 
The animal is variable in colour and prettily mottled. 
I.a., II. It is with great hesitation that I describe as 
new a small species taken as above. Ohne at least of the 
specimens was a female, with ova, which agrees with 
Boeck’s description of the female of P. anguwipes, Kr., 
except in size—Boeck giving 10 mm. as the length, while 
this specimen was not more than3 mm. If I am right in 
believing some of my specimens to be males, then it is 
certainly not P. anguipes, for the second gnathopod (which 
is almost the same shape as, and but little larger than 
the first) in these differs from that in the female only in 
being slightly larger. It is possible that Boeck has been 
mistaken in referring the small males he mentions as 
resembling the females to P. anguipes. If this be so, the 
present species may be considered as new to science, and 
I propose to name it provisionally Podocerus isopus. Mr. 
Stebbing informs me he has received similar forms from | 
Mr. D. Robertson, taken in the Clyde district, and con- 
