540 MR. E. J. MIERS ON [June 6, 
PALINURUS LONGIMANUS, Var. MAURITIANUS, nh. (Plate XXXVI. 
fig. 1.) 
The carapace is of the form usual in Palinurus, with the cervical 
suture very clistinctly defined, and is everywhere covered with flattened 
tubercles whose anterior margins are bordered with a fringe of sete ; 
the tubercles are smaller upon the hepatic and antennal regions ; the 
median rostral spine is small and narrow-acuminate; on either side 
of it are two spines, and behind it, in a median longitudinal series, 
are three other small spines, of which the second is the largest; the 
supraocular spines are very large, the upper margin of each is 
armed with two smaller spines, the lower margin is entire; behind 
each of the supraocular spines, on the gastric region of the carapace, 
are three spines in a longitudinal series ; below these are placed three 
spines on the hepatic region ; there is a strong spine, followed by 
a second much smaller spine, on the antennal region of the carapace 
below the eyes ; about eight spines are placed in a transverse series 
along the front of the cardiac and branchial regions, immediately 
behind the cervical suture. The segments of the postabdomen 
are without spines or tubercles (except the lateral and marginal spines), 
and are marked with transverse linear sutures, which are often in- 
terrupted, and vary in number and disposition on the several segments ; 
their arrangement will be best understood by a reference to the 
figure ; the lateral lobes in the first to sixth segments terminate in 
a strong spine, which, in the second to fifth segments, is long and 
curved backward, and is followed by a small spinule on the rounded 
postero-lateral margins. On the sternal surface of the body, on those 
segments with which the second to fourth legs are articulated, a 
prominence bearing two spines or tubercles is situated on each side 
of the middle line of the body; the last sternal segment is armed 
with a strong spine on each side of the middle line of the body and 
one near the bases of the fifth legs; the inferior surface of the first 
postabdominal segment is armed with about six spinules, the second 
to fifth segments with two, and the sixth segment with three spinules. 
The eye-peduncles are of moderate thickness; the eyes (with their 
cornez) are very large and subspherical ; the median portion of the 
ophthalmic segment is visible in a dorsal view, as in the typical 
Palinuri; and in form the antennulary segment with its stridu- 
lating apparatus, and the antennules and antenne, do not essen- 
tially differ from the same parts in P. vulgaris; the flap of the stri- 
dulating apparatus is indurated: the antepenultimate joint of the 
peduncle of the antennules nearly reaches to the end of the peduncles 
of the antennee. The antennze are broken, but are considerably longer 
than the body ; the joints of the peduncles are covered with flattened, 
ciliated, squamiform prominences resembling those of the carapace, 
and are armed with strong spines ; the flagella have a line of longish 
hairs on their under surface. The left chelipede (the only one pre- 
Served) is very long and robust, more than half as long again as the 
first ambulatory legs; the merus has its upper margin compressed 
and subacute, armed with a spine at the distal end of its upper 
margin ; behind it, and at some distance from one another, are two 
