t 
376 «Ona new Species of Squilla from West Africa. 
between the submedian teeth, six to eight on each side 
between submedian and intermediate, and one between inter- 
mediate and lateral. Marginal thickenings at bases of 
denticles and teeth not confluent in either sex. Exopod of 
uropods with seven or eight spines on proximal segment. 
A good deal of dark pigment persists in spirit-specimens, 
the whole dorsal surface being usually sprinkled with minute 
chromatophores ; the most conspicuous and constant markings 
are a posterior marginal line on each of the free thoracic and 
abdominal somites, a short transverse band on the tergum of 
the third abdominal somite, and a conspicuous blotch on the 
exopod of the uropods, occupying the distal portion of the 
first segment and the inner edge of the second. 
Total length up to 138 mm, : 
HAlolotype.—Male from Lagos, West Africa. Total length 
(tip of rostrum to tip of submedian telson spines) 134 mm. ; 
length of carapace in median line (excluding rostrum) 27°75 
mm, Presented by Mr. J. Cadman. Brit. Mus. reg. no. 
1914, Ad SOT 
Paratypes in Brit. Mus.—The Gambia (4 sps.) ; Sierra 
Leone (1 sp.) ; Lagos (3 lots, 11 sps.) ; the Gaboon (2 lots, 
2 sps.); West Africa (1 sp.). 
Remarks. — The West-African specimens referred by 
Mr. Miers to the North-American Squclla empusa, Say, prove, 
on re-examination, to belong to this very distinct species. 
Although closely resembling both S. empusa and the Medi- 
terranean S. mantis, Latreille, it differs from them in having 
epipodites only on the first four (instead of five) pairs of 
thoracic appendages, and in the presence of a tooth on the 
proximal segment and an undivided ridge (instead of two or 
three teeth) on the carpus of the raptorial limbs. It agrees 
with S. mantis and differs from S. empusa in the relative 
positions of the dorsal pit and the anterior bifurcation on the 
median carina of the carapace; but it resembles S. empusa 
in the shorter corneal axis of the eyes and in the pigmentation 
(so far as it is retained in spirit-specimens), especially in the 
dark spot on the uropods. 
‘Lhe fact that all the West-African specimens of Sguzlla in 
the Museum collection belong to this new species makes it 
probable that all records of S. empusa from that region refer 
to S. africana. Jurich’s elaborate description (J. ¢.) of a 
solitary specimen from the Congo does not mention a single 
one of the distinctive characters, but his figure shows, in the 
position of the dorsal pit of the carapace, the strongly pro- 
curved processes of the fifth thoracic somite, and, less dis- 
tinctly, in the undivided ridge on the carpus, features that are 
peculiar to S. africana, 
