REPORT ON THE BRACHYURA. 
17 
feet state ; it was dredged at Station 214, in 500 fathoms, in lat. 4° 33' 0" N., long., 
127° 6' 0" E., near the Tulur Islands. 
It is at once distinguished from the preceding species by the great development of the 
gastric spines, and by the much longer rostrum and the shorter, thicker eyes, not to 
mention other characters. 
Apocremnus, A. Milne Edwards. 
Apocremnus, A. Milne Edwards, Crust, in Miss. Sci. au Mexique, pt. 5, p. 184, 1879. 
The carapace is subtriangulate and shaped nearly as in Inachus, with strong spines 
upon the gastric, cardiac and branchial regions ; there is a distinct supraocular spine, but 
no postocular spine. The epistoma is large. The post-abdomen in the male is six-jointed, 
the sixth and seventh joints coalescent. The eyes project laterally and are imper- 
fectly retractile. The basal antennal joint is somewhat broader at the base than at the 
distal extremity, which bears a spine and is longitudinally carinated ; the flagella are 
visible from above at the sides of the front. The merus of the outer maxillipedes is 
rounded and somewhat produced at the antero-external angle and slightly notched at the 
antero-internal angle, where it is articulated with the next joint. The chelipedes in the 
male are not robust, and the palm is but very slightly turgid ; the dactyli have between 
them (when closed) an interspace at the base. The ambulatory legs are small and very 
slender, and the dactyli are partially retractile against the penultimate joint. 
The single species, Apocremnus septemspinosus, A. Milne Edwards, has hitherto been 
recorded only from the Florida Straits (37 fathoms). 
Apocremnus septemspinosus, A. Milne Edwards. 
Apocremnus septemspinosus, A. Milne Edwards, tom. cit., p. 185, pi. xxxv. fig. 5, 1879. 
A small male obtained at the Island of Fernando Noronha, in 7 to 20 fathoms, is 
somewhat doubtfully referred to this species. 
In nearly all particulars the detailed description of M. A. Milne Edwards applies to 
this specimen ; the sternum, however, is less distinctly ridged, and more irregularly 
granulated. 
Adult cJ . 
Lines. 
Millims. 
Length of carapace and rostrum, about 
H 
7-5 
Breadth of carapace, ..... 
3 
6-5 
Length of a chelipede, ..... 
5 
11 
m CHALL. EXP. — PART XLIX. 1886.) 
Ccc 3 
