CRUSTACEA OF THE MERGUI ARCHIPELAGO. 43 
- Iam indebted to Dr. Hilgendorf for the following information 
regarding Cancer Panope, Herbst, which really belongs to the 
genus Menippe, the orbits not being closed internally. The typical 
specimen of Herbst’s Cancer Panope is 193 millim. broad and 
143 millim. long. In this species the granules, which are found 
on the middle of the outer surface of the hands, are larger than 
those of the upper and under margins of the palm, as they 
have a diameter of 4 millim., whereas in Myomenippe granulosa, 
A. M.-Edw., the largest granules are found on the upper margin. 
In Menippe Panope the front is not divided into six teeth, and 
the postero-lateral regions of the cephalothorax are nearly quite 
smooth behind the last antero-lateral tooth, whereas they are dis- 
tinetly granular in Myomenippe granulosa, A. M.-Kdw. The lobes 
on the upper surface of the carapace are less distinct in Menippe 
Panope, being even less developed than in Herbst’s figure. 
The course or direction of the last antero-lateral tooth and the 
form of the posterior margin of the cephalothorax are also some- 
what different in both species. 
Genus Eurycarcinus, Alph. M.-Hdw. 
There can be little doubt that the small crustacean described 
by Alph. Milne-Edwards as a second representative of his genus 
Pilumnopeus must be referred to Hurycarcinus. Pilumnopeus 
maculatus, indeed, perfectly agrees, in its outer appearance and 
in its essential characters, with the true representatives of Hury- 
carcinus, viz. HE. natalensis, Krauss, HL. Grandidieri, A. M.-Edw., 
E. orientalis, A. M.-Edw., and E. integrifrons, d. M.*, so that 
there is no reason to refer it to a distinct genus. 
The small group of Crustaceans which bears the name of Eu- 
rycarcinus 18, 11 My Opinion, a very natural one. It belongs 
to those forms the palate of which is more or less distinctly 
divided by a ridge defining the margin of the efferent canal, such 
as Ozius, Epixanthus, Heteropanope, and Pilumnus; but it is dis- 
tinguished by its outer physiognomy—the enlarged cephalo- 
thorax, which is very convex longitudinally, the transverse orbits, 
* J will here remark that Hurycarcinus integrifrons, which I described some 
years ago (Notes from the Leyden Museum, i. p. 55), may perhaps prove to be 
identical with Hurycarcinus orientalis, very shortly described by A. Milne- 
Edwards from specimens obtained at Bombay (Annal. Soc. Entom. France, 
1867, p. 277). 
