MUSEUM OF COMPARATIVE ZOOLOGY. 201 
anastomose in such a way as to divide these regions into cells of different sizes; 
they are armed with three small spines, the anterior of which is the spina 
hepatica. 
The thoracic sterna are armed with two median spines, one of which is situ- 
ated on the somite which normally bears the second pair of legs (absent in this 
genus), the other on the somite behind this. Abdominal pleure acute. 
Chelipeds of moderate length, with a spine on each side of the distal end of 
the carpus, and another long and acute one at the antero-internal angle of the 
propodus. 
Length, 85 mm. 
Station 3424, 676 fathoms. 2 males, 3 females (1 ovig.). 
P| A202 GBD 1 male. 
Family GLYPHOCRANGONIDZ. 
Glyphocrangon alata, sp. nov. 
Rostrum armed with a pair of lateral spines on a level with the anterior end 
of the eye ; posterior to this pair of spines follows a variable number of smaller 
marginal spines (three to five on each side). The anterior half of the rostrum 
is unarmed, although ciliated on the margin. A light spinulose carina runs 
along the median line of the rostrum from the base to the anterior third (in 
some specimens this carina is obsolete). On each side of the median line there 
are, on the basal part of the rostrum, four or five small spinules. 
Carapace and abdomen thickly tuberculated. On the antero-lateral regions 
of the carapace, and on the abdominal pleure, the tubercles assume a spiny 
character. For the rest, the tubercles are mostly compressed, their tops trun- 
cate and more or less eroded. It is further to be noted that these tubercles are 
arranged in longitudinal rows, and that six of these rows on each side of the 
carapace form, by their prominence, imperfect carine, corresponding in position 
to those commonly found in species of this genus. Between the external or- 
bital spine and the spine at the antero-lateral angle of the carapace lies a 
strong spinous tooth, acute at the end and vertically compressed, its base 
broadening out in such a fashion that the whole tooth forms an acute, wing- 
like expansion. This is, in fact, the greatly developed anterior part of the 
fourth carina (counting from the median dorsal line). Behind it the carina 
continues as a low toothed ridge. A median interrupted dorsal carina runs 
along the abdomen, broken up into two teeth on the base of the telson. 
Length, 116 mm. 
Station ? 12-++ specimens. 
“3395. 730 fathoms. 1 s 
6, 3418; 660. 2 = 
