PROCEEDIXGS OF UNITED STATES NATIONAL MUSEUM. 419 



and tbo prehensile edges straight and very regularly dentate. The two 

 first pairs of ambulatory legs are nearly alike, twice as long as the 

 chelipeds, and nearly or quite naked; the propodus is a little shorter 

 than the merus, very slightly compressed, and smooth, but slightly 

 grooved longitudinally ; the dactylus is once and a half as long as the 

 propodns, very much compressed vertically, slightly curved, of nearly 

 uniform breadth to a short distance from the acuminate tip, and very 

 smooth. The third and fourth pairs of ambulatory legs are nearly alike, 

 scarcely half as long as the first and second, slender, and covered with 

 short pubescence, except upon the dactyli. The propodus is much 

 shorter than the merus, not ver^- much shorter than the cari)us, nearly 

 cylindrical, and not expanded distally ; the dactylus is very short and 

 strongly curved. 



The single specimen seen, from station 878 (142 fathoms), gives the 

 following measurements : 



mm. 



Leugtli of carapax, including frontal spines 13. 5 



Greatest breadth of carapax 14.0 



Breadth between antero-lateral spines 7. 



Breadth between tips of inner angles of orbital sinuses 3. 1 



Length of cheliped 18. 



Length of chela 8.0 



Breadth of chela 1.7 



Length of dactylus 4.0 



Length of second ambulatory leg 38. 



Length of its propodus 8. 



Length of its dactylus 12. 



Length of fourth ambulatory leg 18. 



Length of its propodus 3. 6 



Length of its dactylus 1. 5. 



The very small eyes and the great breadth and prominent antero- 

 lateral angles of the caraj^ax at once distinguish this species Irom U. 

 mascarone, of the Mediterranean, and from the Jai)anese U. sexdentata. 

 It is also evidently distinct from U. granulata Norman, which, however, 

 has apparently not been fully described. The genus has not, I think, 

 been recorded from America before, although a species occurs in the 

 Bay of Panama. 



ANOMUEA. 



Latreillia elegans Roux, Crust. Mediterrande, pi. 22, 1823. — Milne-Edwards, Hist. Nat. 

 Crust., i, p. 277, 1834. — De Haan, Fauna Japouica, p. IDS, 1837. — Lucas, Ex- 

 plor. de I'Algdrie, Animaux Articulds, i, p. 3, pi. 1, fig. 1, 1849. — Heller, Crust, 

 siidlichen Europa, p. 147, pi. 4, tig. 14 (anterior part of carapax after Lucas). 



Station 872, 86 fathoms (three females) ; 874, 85 fathoms (fragment 

 of carapax). 



I have had no European specimens for comparison, and have seen 

 only a tracing of Rouxs figure, with which the specimens before me 

 agree well. In these specimens the propodus in the posterior pair of 

 legs is a little more than two-thirds as long as the merus, and the dac- 

 tylus is very short and closes against the somewhat oblitj[ue and spinous 



