132 A HISTORY OF EECENT CRUSTACEA 



among the Italians, in evident allusion to the resemblance 

 it bears to a comic mask. Similarly, Borippe dorsipes 

 (Linn.) is not inappropriately named by the Japanese ' the 

 demon-faced crab.' Borippe japonica, von Siebold, repre- 

 sented on the preceding page, is closely allied to Herbst's 

 Borippe facchino. 



Mhusa, Roux, 1828, unlike Borippe, which usually 

 has the carapace broader thaa 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. Ethtcsa mascarone, Roux, is 

 a Mediterranean species. - Ethusiria, S. I. Smith, 1884, is 

 closely allied to Ethusa, but distinguished by the form of 

 the first antennas, the basal joints of which are very large 

 and swollen, occupying the whole width of the ' front,' and 

 crowding back the eyes and second antennae into an almost 

 transverse position. The type species, Ethusina abyssicola, 

 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 Etlvusa being those which descend to greater 

 depths in the ocean than any of the Brachyura which we 

 have been hitherto discussing. The species Mhusa granu- 

 lata, Norman, has been transferred to a separate genus, 

 CymonOmus, by Professor A. Milne-Edwards. 



Gymopolia, Roux, 1828, has for its type species, Gymo- 

 folia Garonii, 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 

 oi)inion has not been followed. 



