1879.] THE COREAN AND JAPANESE SEAS. 43 



region. Anterior legs rather long and nearly smooth ; arm obscurely 

 trigonous, but without prominent angles ; palm moderately convex ; 

 fingers straight and acute. Postabdomen of male with all the se*- 

 ments except the last coalescent. Length 5| lines, breadth 6 linel 



A male and female are in the collection, without definite locality. 



This species differs from most of the genus in the entire absence 

 of tubercles upon the carapace. It has some affinity with Ebalia 

 tuberosa, Pennant {E. pennantii. Leach), from the British seas, 

 but differs in the uninterrupted lateral margins and in the form of the 

 front, which in that species is concave. 



Ebalia minor, sp. n. 



This species resembles the preceding ; but the carapace is broader 

 and very much more coarsely granulated on the frontal, cardiac, 

 branchial, and intestinal regions and antero-lateral and postero-lateral 

 margins. The front is slightly concave. The intestinal region is 

 much less prominent, and there is scarcely any trace of longitudinal 

 and transverse ridges ; the posterior and postero-lateral margin of 

 the carapace is slightly revolute. Length 3 lines, breadth 3^ 

 lines. 



Three males and one female were collected with the preceding ; 

 and all are of much smaller size than the fuUy-grown male of the 

 precedmg species, to which they bear much external resemblance. 

 The distinctions, however, are not sexual, and appear too considerable 

 for the two forms to be varieties of one and the same species. 



Ebalia bituberculata, sp. n. 



This species resembles the E. rhomboidalis ; but the longitudinal 

 and transverse ridges on the carapace and the depressions on the 

 branchial region are much more strongly marked ; in the centre of 

 the carapace, upon the branchial region, are two distinct tubercles; 

 the posterior margin is broader and straight, not bilobed. 



A single female example was obtained'at 52 fms., in lat. 34° 12' 

 N., long. 136° 28' E. 



Cryptocnemus pentagonus. (Plate II. fig. 5.) 



Cryptocnemus pentagonus, Stimpson, Proc. Ac. Nat. Sci. Phil, 

 p. 161 (1858). 



A single male individual is in the collection, obtained at 36 fms., in 

 lat.33°10'N., long. 129° 12'E., in June 18/6. It has unfortunately 

 lost ail its legs, but agrees in all respects with Stimpson's de- 

 scription. 



This is a most interesting addition to the British- Museum collection, 

 as only three species have been described, the present being the only 

 one not figured hitherto, and that on which the genus was founded. 

 A comparison of the figure now given with that of the C. holdsivorthi 

 described by me last year in Trans. Linn. Soc. (ser. 2), Zool. i. p. 

 241, pi. xxxviii. figs. 30-32, will show the differences in the form of 

 the carapace and rostrum between the two species. 



