20 
SPOLIA ZEYLANICA. 
peracopods) as being alike. Bate speaks of the fifth and sixth 
joints in these limbs as 44 short, slender; ” Miss Richardson 
regards the same joints as 44 long and slender.” But, to judge by 
the figure which the latter naturalist gives as “ leg of first pair ” 
(that is, the first gnathopod), the joints in question are long or 
short indifferently according to the standard of comparison, short 
compared with the second and third joints of the first three pairs 
of limbs, long compared with the homologous joints in the two 
following pairs. It is not, however, the case that the first three 
pairs of limbs are all alike. At least in the Ceylon specimens the 
first pair have the fifth joint extremely short, with the hind 
margin longer than the front, so that it under-rides the sixth joint. 
This differentiation of the first gnathopods is so habitual in the 
Sphseromidse that its absence from the specimens collected in 
Brazil, Madras, and Florida is quite improbable. On the other 
hand, the general resemblance in the three pairs of slender limbs, 
with their striking armature of long setae close-set in double rows, 
is very great, so that when detached from the body they may 
easily be confused. 
The second and third peraeopods are somewhat similar in 
pattern one to the other, but the second joint is longer and more 
slender in the third pair than in the second, and the third joint 
is larger in the second pair than in the third. 
The fifth peraeopods again resemble the fourth in pattern, but 
have all the joints except the finger more elongate. These pairs by 
their broad but laminar joints are strongly distinguished from the 
two preceding pairs, which are short and stout. They have a 
fringe of serrated spines on the apex of the fifth joint, which Bate 
transfers to the sixth joint, though his figure pretty clearly shows 
that he meant the fifth. He also says that the last four pairs of 
limbs 44 resemble each other in general form,” which is quite con¬ 
trary to the fact in the Ceylon specimens, and, to judge by his 
figures, also in those from Madras. 
The pleopods are satisfactorily described by Bate. To the 
uropods he allots a single branch, but it is quite clear that what 
he speaks of as the produced part of the peduncle is the inner 
branch in coalescence. The articulated outer branch has, he says, 
five or six teeth on the outer margin. This agrees with the Ceylon 
specimen figured herewith, the teeth being in fact spines, six in 
number if the apical one be included. Miss Richardson mentions 
four teeth on the outer edge, but as this number is also found in 
the Ceylon specimens, the precise number is immaterial. 
The colour, which Bate gives as sage green, and Miss Richardson 
as 44 a dark brown, shaded on the edges with a lighter brown,” is in 
