1880.] NATURAL SCIENCES OF PHILADELPHIA. 145 



the inner margin slightly produced and denticulate. I'ulni exter- 

 nally granulate above, smooth below, its upper margin granulate 

 and indistinctly indicated by an impressed line on the outer sur- 

 f;ice, and its inner surface smooth, without tubercular ridges, 

 except one at the base of the fingers. Fingers long, slender, 

 slightly compressed and regularly tapering, the extremity of the 

 dactylus somewhat expanded and excavate. 



Natal! E. Wilsou (Phila. Acad.). 



Named in honor of my friend Prof. S. I. Smith, of Yale College, 

 who has monographed the Amei'ican species of this genus. 



17. Gelasimus urvillei M.-Edw. PI. i.\, f. 15. 



GeUisiinus urvillei M.-Edw., Ann. Sci. Nat., Ill, xviii i). 148, PI. Ill, 

 f. 10 (1852). 



Resembles closely G. forceps, but has the medio-frontal sulcus 

 nearly linear, and the fingers shorter, the anterior border of the 

 meros of the larger cheliped obtuse and granulate (M.-Edw.). 



Vanikoro (M.-Edw.). 



18. Gelasimus dussamieri M.-Edw. PI. x, f. 16. 



Gelasimus dussumieri M.-^dw., Ann. Sci. Nat., Ill, xviii, PI. IV, f. 12, 

 (1852)? Hilgendorf in van der Decken's Reise in Ost Afrika, 

 Crustaceen, p. 84, PI. IV, f. 1 (1867) ; Alph. M -Edw., Nouv. Arch, 

 da Mus. d'Hist. Nat. IX, p. 274 (1873). 



Resembles closely G. urvillei, but the accessory sub-orbital lobe 

 is less marked, the median sulcus of the front entirely linear and 

 the anterior border of the meros of the larger cheliped denticu- 

 late. Chela ver}- large, G. rubripes is closely allied, but appears 

 to be distinguished by the form of the fingers of the larger hand, 

 the larger tubercles of the carpus, etc., (Ex. auct.). 



Malabar and Samarang (Edw.) ; New Caledonia (A. M.-Edw.) ; 

 Zanzibar (Hilgendorf). 



19. Gelasimus rubripes Jacq. and Lucas. PI. x, f. 17. 



Geliisimus rubripes Jacquinot and Lucas, Voyage des Astrolabe et Zelee 

 Crustacea, p. 66, PI. VI, f. 2 (1853) ; Heller, Reise der Novara Crus- 

 taceen, p. 38 (1867). 



Orbits granulate above and below, carpus of larger cheliped 

 with the external portion granulate, its margins finely denticulate. 

 Hand prominently granulate, internally smooth except fine granu- 

 lations at the origin of the thumb ; below strongl^^ dentate, finger 

 smooth except at the base where it is granulate; the inner margin 

 of the thumb with three large teeth, the intervals between which 



