182 A HISTORY OF RECENT CRUSTACEA 
among the Italians, in evident allusion to the resemblance 
it bears to a comic mask. Similarly, Dorippe dorsipes 
(Linn.) is not inappropriately named by the Japanese ‘ the 
demon-faced crab.’ Dorippe japonica, von Siebold, repre- 
sented on the preceding page, is closely allied to Herbst’s 
Dorippe facchino. 
Ethasa, Roux, 1828, unlike Dorippe, which usually 
has the carapace broader than long, in general has the 
carapace much longer than broad. Miers notices that 
the species of this genus are the forms which evince 
the greatest degree of degradation from the Brachyuran 
type. In other words, they make the nearest approach 
to the next tribe, which in Mr. Miers’ work is not in- 
cluded among the Brachyura. Hthusa mascarone, Roux, is 
a Mediterranean species. Lthusina, 8. I. Smith, 1884, is 
closely allied to Hthusa, but distinguished by the form of 
the first antennz, the basal joints of which are very large 
and swollen, occupying the whole width of the ‘ front,’ and 
crowding back the eyes and second antennz into an almost 
transverse position. The type species, Hthusina abyssicéla, 
Smith, was dredged off the East Coast of the United States 
at a depth of about 1,500 fathoms, the members of this 
genus and Hthusa being those which descend to greater 
depths in the ocean than any of the Brachyura which we 
have been hitherto discussing. The species Hihusa granu- 
luta, Norman, has been transferred to a separate genus, 
Cymonémus, by Professor A. Milne-Edwards. 
Cymopolia, Roux, 1828, has for its type species, Cymo- 
polia Caronii, Roux, from the Mediterranean, but it includes 
twelve species in all, of which eight have been recently in- 
stituted by Professor A. Milne-Edwards from dredgings in 
the Gulf of Mexico and Straits of Florida. De Haan con- 
sidered that it ought to stand among the Maiacea, but his 
opinion has not been followed. 
