132 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



very slightly towards the distal end, and lies for nearly its whole length in the 

 hroad orbital hiatus; the second joint reaches the margin of the front. 



The buccal cavity widens considerably at its anterior end. The merus of the 

 outer maxilliped is not dilated at its antero-external angle. 



The chelipeds are stouter and not so long as the legs, the arm and the hand 

 of about equal thickness. Three spines on inner border of arm ; the customary 

 spine (of good size) at inner angle of wrist, and a few smaller spines on its outer 

 surface ; three spines on palm, one at angle of wrist, and two side by side nearer 

 the fingers. Dactylus longer than upper surface of palm. 



First three pairs of legs slender, also the basal segments (including the carpus) 

 of the last pair ; merus of last pair with a spine toward the end of its lower 

 margin. 



It is probable that the adult of this species will prove to have the same rela- 

 tion to Archias that Thalamita has to Charybdis. 



CANCRID^. 

 Kraussia nitida Stimpson. 



Fig. 13. 



Kraussia nitida Stimpson, Proc. Acad. Nat. Sci. Phila., X. 40 [37], 1858. Miers, 

 Crust. Alert, 235, 1884. ? Calman, Trans. Linn. Soc. London (2), Zool., 



VIII. 24, 1900. Not K. nitida Henderson, Trans. Linn. Soc. London (2), V. 

 379. pi. XXXVII. fig. 9, 1893, nor Alcock, Journ. Asiatic Soc. Bengal, 

 LXVIII. 98, 1899. 



Kraussia Integra Borradaile, Fauna Maldive Arch., I. pt. III. p. 270, 1902. Not 

 K. integra de Haan. 



Nallandu, 24 fathoms, at anchorage, January 18; two males, one female. 



Distribution. — North China Sea, lat. 23°, 24 fathoms, and Kagosima Bay, 

 Japan, 20 fathoms (Stimpson). Thursday Island, Torres Straits, 4-5 fathoms 

 (Miers). 



A comparison of Stimpson's unpublished figure with that of Henderson 

 seems to indicate two distinct species. The Maldive specimens agree sufficiently 

 with Stimpson's figure. The fronto-orbital width is nearly two-thirds the full 

 width of the carapace, the frontal lobes are subequal and equally produced ; in 

 Henderson's species, as represented by his figure and by a specimen in the 

 United States National Museum from Samoa, the fronto-orbital width is only 

 half as great as that of the carapace, the median lobes of the front are much 

 narrower and less advanced than the lateral pair. 



In the Samoan specimen of K. nitida Henderson (which I will call K. hen- 

 dersoni), a large male, 17.5 mm. long and 20.5 mm. wide, fronto-orbital width 

 10.6 mm., the outer surface of the palm is faintly rugulose, the dactylus serru- 

 late, the inner angle of the wrist has sharp granules, and the adjacent margin 



