REPORT ON THE BRACHYURA. 
231 
The dimensions of this specimen are as follows : — 
Adult ?. 
Lines. 
Millims. 
Length of carapace, . . . . . 
8 
17 
Greatest breadth of carapace, . . . . 
9 
19 
Length of right chelipede, . . . . 
151 
33 
Length of second ambulatory leg, 
171 
37 
This variety differs from the type of the species, as described by Milne Edwards, in 
one character only, and that which constituted the most distinctive peculiarity of the type, 
i.e., in having the small ocular peduncles provided with distinct, small, terminal cornese. 
I may add, that the ambulatory legs are not only hispid with short hairs, but also 
fringed with longer hairs. In all other characters, as, e.g., in its being furnished with a 
stridulating ridge at the distal extremity of the merus-joint of the clielipedes, and in the 
curious dissimilarity of the right and left chelae, this specimen agrees with the typical 
form of the species . 1 
Litocheira, Kinahan. 
Litoclieirci , Kinahan, Journ. Roy. Dublin Soc., vol. i. p. 121, 1858. 
1 Brachygrapsus, Kingsley, Proc. Acad. Nat. Sci. Philad., p. 203, 1880. 
Carapace broader than long, somewhat quadrilateral, with the sides nearly straight ; 
the antero-lateral margins armed with a tooth or spine behind the exterior angle of the 
orbit. The front is straight or slightly arcuated, and (in the species I have examined) it 
is rather broad, usually exceeding half the width of the carapace, and the orbital margins 
are entire. The epistoma is transverse. The ridges of the endostome are distinctly 
developed (in the species I have examined). The post-abdomen in the male and the 
basal segments cover the whole width of the sternum, between the bases of the fifth 
ambulatory legs. The eye-peduncles are' robust and of moderate length, the cornese large. 
The basal joint of the antennae is slender and rather longer than the following joint, and 
usually does not reach the infero-lateral process of the front ; the antennal flagellum is 
moderately elongated. The exterior maxillipedes meet, or nearly meet, along their inner 
margins; their ischium-joints are not produced at the antero-internal angles; the merus- 
joints are distally truncated, and the antero-lateral angles (where the next joint articu- 
lates) are slightly emarginate ; the antero- external angles not greatly produced. The 
chelipedes in the adult male are subequal and of moderate length, with the merus-joints 
1 It is worthy of note that the specimens described by Milne Edwards from the collections obtained in the 
Expedition of the TJ.S.S. “Blake,” under the superintendence of Professor A. Agassiz, in 1877 to 1879, were dredged 
at Prederickstadt and Santa Lucia at a much greater depth (423 to 451 fathoms). The Rev. A. M. Norman (in 
Wyville-Thomson, Depths of the Sea, p. 176), mentions a somewhat analogous modification of the ocular peduncles in 
Ethusa granulata, where the eyes are smooth and rounded in specimens dredged in 110 to 370 fathoms, but are firmly 
fixed in their sockets, and assume the functions of a rostrum, in the specimens (of more northerly habitat) dredged in 
542 and 705 fathoms. 
