NO. 1307. JAPANESE STALK-EYED CR USTA CEANS—RA THE UN. 49 



The outer maxillipeds are rather stout, and when extended lie along 

 three-fifths of the antennal scale; the antepenult segment has a narrow 

 laminar expansion below. The first pair of feet attain the end of the 

 penultimate joint of the maxilliped; the merus joint has the expansion 

 characteristic of the genus. The feet of the second pair are equal, 

 carpus 11 or 12 jointed, the proximal and the distal joint elongate, the 

 intermediate joints short and subequal; the chela' exceed the maxilli- 

 peds l)y the length of the fingers. The third pair reach scarcel}"^ 

 beyond the second pair; the fourth and fifth pairs are much shorter 

 and there is little difference in their length; the fifth pair reaches as 

 far as the first pair; the propodi are three times as long as the dactyli 

 in the third pair, four times as long in the fifth pair, intermediate in 

 the fourth pair. 



The abdomen is strongly ))ent at the third segment, which is later- 

 ally compressed, forming a rounded carina. The fourth, fifth, and 

 sixth segments are armed with a postero-inferior spine. Sixth seg- 

 ment three-fifths as long as carapace and four-fifths as long as telson, 

 the latter armed with 4: or 5 spinules on each side. Telson a little 

 shorter than the uropods, of which the inner pair are shorter than the 

 outer. 



Dimensions. — Female: Length 105 nnn., length of carapace and 

 rostrum -15 mm., length of rostrum 28.1 mm. 



Type h)c((Uty. — Mororan, Hokkaido; Jordan and Snyder; 55 speci- 

 mens, types (Cat. No. 20161). Two specimens had been taken previ- 

 OQsl}' at the same locality by N. Grebnitzki. 



The specific name is given in honor of Prof. K. Mitsukuri, of the 

 University of Tokyo. 



Family ATYID^E. 



XIPHOCARIS COMPRESSA (de Haan). 



.' Epityra comjyressit de Haan, Fauna Japon., Crunt., 1<S49, p. 186, pi. xlvi, tig. 7. 

 Xiphocaris compra^i^t Oktmann, Proc. Acad. Nat. Sci. Phila., 1894, p. 400, and 

 synonymy. 



Lake Biwa, Matsubara, Omi; many specimens about 1 inch long; 

 Jordan and Snyder. 



Tsushima Island, Japan; P. L. Jouy, May, 1885, 1 female with ova. 

 Near Fusan, Korea, in fresh-water streams: P. L. Jouy, 1 specimen. 



CARIDINA DENTICULATA de Haan. 



Hippolyte denticiihtlaK Dii Haax, Fauna Japon., Cruyt., pi. xlv, tig. 8. (Generic 



name changed in text. ) 

 Oiridhtd dentindata de Haax, Fauna Japon., Crust., 1849, p. 18f). — Oktmann, 



Vnw. Acad. Nat. Sci. Piiila., 1894, p. 406. 



The rostrum extends eithei to the middle of the third antennular 

 segment, to the end of that s(\gment, or even beyond it. The dorsal 

 Proc. N. M. vol. xxvi-~(i2 i 



