736 ME. W. F. LANCHESTER ON CRUSTACEANS [June 19, 



XXII. Genus Lophozozyhus A. M.-Edw. 



39. Lophozozymus epheliticus Linn. 



Cancer epheliticus, Linn, (fide auctor.). 



XantJio octodentatus, M.-Edw. Hist. Nat. Crust, t. i. p. 398 

 (1834); Jacq. et Lucas, Voyage au Pole du Sud, Crust, p. 23, 

 pi. ix. f. 1 (Hombron et Jaeq. tome iii. 1853). 



Lophozozymus octodentatus, Hasw. Cat. Austr. Crust, p. 58 

 (1882). 



Lopliozozymus epTieliticus, Walker, Journ. Linn. Soc, Zool. vol. xx. 

 p. 109 (1887); de Man, Zoolog. Jahrb. Bd. viii. p. 518 (1895). 



Hab. Singapore ; littoral. One male and three females : and 

 one younger male. 



In these specimens I note the following variations : — In the 

 adult male, the fissure in the dorsal crest of the merus of the 

 chelipedes opens widely at the top in the left arm, being broader 

 above than below, whereas in the right arm it is nearly closed 

 above ; and in the right arm of one of the females it is completely 

 closed above. Further, in the females the two tubercles on the 

 inner edge of the carpus show a tendency to unite and form a 

 ridge with concave edge. In the right carpus of one it forms a 

 tri-tuberculate ridge, in the left the posterior tubercle is rudi- 

 mentary, lying at the base of the other ; while on the right carpus 

 of another the two are nearly obsolete, being only represented by 

 a very small excrescence. 



Dim. 6 56x36-5. 6 32-5x20. 2 64x41-5. $58-5x37-5. 

 2 56-5x37. 



40. Lophozozymus (Lophoxanthus) leucomanus Lockington. 



Xanihodes leucomanus. Lockington, Proc. Calif. Ac. Nat. Sci. 

 pp. 32, 100 (1876). 



Lophozozymus (Lophoccanthus) beUug, var. leucomanus, Miers, 

 « Challenger' Brachyura, p. 115, pi. xi. f. 1 (1886). 



Hab. Singapore. I have no record of the depth. A male and 

 a female. 



Colour of carapace grey-black, of legs white-yellow. I cannot 

 but regard this as specifically distinct from L. bellus Stm., after 

 comparing it with two examples of the latter that are in the 

 Museum collection. Superficially, the carapace of L. leucomanus 

 appears, and is actually, broader in proportion to the length than 

 that of L. bellus, and the front projects much farther forward 

 beyond the orbits. The result of this is that the crab has a 

 definitely six-sided appearance, which is not seen in L. lellus. 

 The antero-lateral margins also differ very considerably, for in 

 L. leucomanus they are continued in front to a point below the 

 orbits, making the hepatic regions somewhat concave ; whereas in 

 L. bellus the margin is continued, at the same level, to the external 

 orbital angle, and the hepatic regions are slightly convex. The 

 rugosities of the carapace are also very distinctive in L. leucomanus, 



