370 Mr. E. J. Miers on Crustacea from 
to this species with little hesitation after comparison with 
Leach’s types in the British Museum, which are from the 
Mediterranean, and are dried and in fairly good condition. 
The length of the largest of the West-African examples is 
not quite 4 lines (8 millim.), whereas that of the largest of 
the Mediterranean types is about 6 lines (over 12 millim.). 
It may be useful to subjoin a detailed description of this 
species, the original diagnoses being very short and insuff- 
cient. 
Body oblong-oval, convex, and nearly smooth. Head trans- 
verse, closely encased in the first segment of the body, smooth 
above, its anterior margin with only a very small subacute me- 
dian rostriform lobe that projects somewhat between the bases 
of the antennules. First thoracic segment more than twice as 
long as the following, with its antero-lateral angles little pro- - 
minent; the following segments of the thorax are short, with 
their posterior margins straight and their postero-lateral angles 
nearly right angles. The postabdomen has not more than 
four or five of its segments visible in a dorsal view ; of these 
the first four are very short, the second and third having their 
sides prolonged, acute, and visible in a lateral view; the 
penultimate has its posterior margin perfectly straight to 
within a short distance of the lateral angles; the terminal 
segment is nearly equilaterally triangulate, flat above, with 
the apex subacute and fringed with hairs. The eyes, which 
are placed close to the postero-lateral angles of the head 
and occupy about half of the lateral margins, are oblong in a 
lateral view and more or less distinctly faceted. The an- 
tennules reach about to the posterior margin of the head; the 
two visible joints of the peduncle are moderately enlarged and 
of nearly equal length; flagellum of eight or nine joints. An- 
tenn barely half as long as the animal, with the last two 
joints of the peduncle subequal and longer than the pre- 
ceding; flagellum with numerous joints (twenty to forty). 
Epimera of second and third segments oblong and transverse ; 
those of the four following segments with the postero-lateral 
angles slightly prolonged and acute, and with an oblique line 
on their outer surface. Legs moderately robust, the fourth 
to sixth joints margined with short stiff sete ; dactylus shghtly 
curved. Uropoda little longer than the terminal segment, the 
rami arising from a broad and transverse base, margined with 
hairs, the outer the narower, both somewhat ovate, outer with 
the apex subacute. Colour more or less of a yellowish brown, 
with darker punctulations. 
Oirolana Swainsonii is regarded (but doubtfully) by Heller 
(t. c.) as synonymous with C. hirtipes of Milne-EKdwards, a 
