Carcinological Fauna of ImUu. 443 



Epigrapsus, Heller. 



Epigrapsus, Holler, Verh. zool.-bot. Gcs. Wien, XII, 1862, p. 522: Kingslo^, 

 Proo. Ac. Nat. Sci. Philad, 1880, pp. 188, 192: Miers "Challenger" Brachynra. 

 p. 265. 



Nectograpsiis, Ilellcr, Novara Crust, p. 50. 



This genus is really identical with Grapsodes, from which it difFers 

 in no single point of importance. 



The trivial characters that separate it from Grapsodes are the 

 following : — 



The regions of the carapace are hardly distinguishable, and the 

 lateral margins are entire: the chelipeds in the male are markedly 

 unequal, one of them being longer and vastly more massive than the 

 legs, the other being hardly larger than those of the female (which 

 resemble those of Grapsodes) : though the legs resemble those of 

 Grapsodes in proportions and in the singular length of the dactyli, they 

 differ in having only the terminal joint hirsute. 



Distribution : Islands of the East Indian Archipelago and Polynesia. 



127. Epigrapsus politus, Heller. 



Epigrapsus politus, Heller, Verh. zool.-bot, Ges. Wien, XII. 1862, p. 522 : 

 Kingsley, Proc. Ac. Nat. Sci. Philad. 1880, p. 192 : Miera, Challenger Brachyura, 

 p. 266 : Ortmann, Zool. Jahrb., Syst., VII. 1893-94, p. 703 : de Man, Zool. Jahrb. 

 Syst. IX. 1895-97, p. 79. 



Nectograpsus politus. Heller, Novara Crust, p. 57, pi. v. fig. 3. 



Carapace about seven-eighths as long as broad, perfectly smooth, 

 the outer orbital angle not pronounced and the lateral margins entire 

 in the adult. The line of flexion of the front is a little concave in tho 

 middle. Epistome and pterygostomian regions tomentose. 



Chelipeds smooth, equal in the female, markedly unequal in the 

 male. In the male the larger cheliped is more than twice the leno-th 

 of the carapace, the inner angle of the wrist is not pronounced, the 

 palm is about as high as long and has a strong bulge at its postero- 

 inferior angle, the dactylus is much longer than the immobile finger, 

 and the dactylus has 2 or 3 small molai'iform teeth while the immobile 

 finger has a single one. 



In the female the chelipeds are little longer than the carapace, 

 have the inner angle of the wrist pronounced, the palm not enlarged 

 or inflated, and the fingers finely and inconspicuously toothed and nearly 

 equal in length. 



The smaller cheliped of the male is but little larger than those of 

 the female. 



785 



