224 ZOOLOGISCHE MEDEDEELINGEN — DEEL III. 





at the margin than on the surface itself, and, besides, there is a tuft of 
longer hairs on each side, beneath and somewhat outward of the median 
postfrontal lobes; the lateral margins of the front are concave, and the 
angles, where again a small tuft of hairs is observed, are rectangular, 
so that the anterior margin slightly exceeds the breadth of the front 
between the eye-stalks; the latter width is */, of the distance between 
the outer orbital angles. The postfrontal lobes are indistinct, owing to 
the hairy covering, and the grooves separating them are very shallow, 
and broad, but, after removal fe the hairs, the median lobes prove to be 
twice as large as the external ones, and the latter are divided, by a 
very indistinct furrow, into two parts, the outer one Ber ae 
the larger and situated farther forward. According to Miss 
Rathbun the postfrontal lobes are “prominent and deeply separated, the 
outer a little narrower than the inner”, but this difference from my 
description may be perhaps merely subjective. The orbits are very high, 
owing to the fact, that the upper orbital border is very much sloping 
backward, but there is no trace of a convex inner part, as in Cl, 
balansae; it is regularly curved and passes with a right angle into the 
small external orbital angle; the latter is, however, still somewhat larger 
than the anterior epibranchial tooth, and has a convex outer margin, that 
is separated from the following tooth by a deep incision, though in other 
case this incision is much less marked, and, likewise, the tip of the 
epibranchial tooth may be somewhat pointed or quite obtuse. Again, be- 
hind the anterior epibranchial tooth, there is a second, with convex outer 
margin, that is somewhat longer than that of the preceding tooth, but 
scarcely defined posteriorly. All the teeth have thickened, minutely punc- 
tate margins, and this character is caused by the insertion of numerous 
thick, brown hairs, that project beyond the teeth, and make them look 
much longer than they really are, especially in the case of the posterior 
tooth; in fact the distance between external orbital angles and epibran- 
chial teeth is about the same and about equal to the length of 
the carapace in the median line, though more exactly so in the 
older specimens, at least in my only full-grown ova-bearing 9; Miss 
Rathbun has, besides, observed the same in her only specimen, an adult 
QO. The lateral margins of the carapace are exactly parallel, but slightly 
hollowed out immediately behind the posterior epibranchial teeth. 
The abdomen of the & (Fig. 3c) is much like that of the other species 
of this genus, but the 5th segment is as long as the 6th segment, 
though distinctly longer than the preceding joint; the posterior margin 
of the penultimate segment is only 2'/, times (in the other species nearly 
three times) the length of this joint. The last segment is much shorter 
