1880.] NATURAL SCIENCES OF PHILADELPHIA. 181 



thalma (teste Edw., the single specimen I have seen has the ej-es 

 broken). External maxillipeds granulate ; meros of larger cheli- 

 ped with the upper margin produced and dentate, the lower 

 spined, the posterior with transverse granular rugae, carpus 

 granulate ; hand with large granules, serrate below, stridulating 

 ridges carved and composed of crowded granules. Ambulators- 

 feet with rugre and subspiniform tubercles, dactyli broad. 



Pondiclierry \ Guerin's Collection (labelled by Guerin "Ocypoda 

 platytarsis, Edw., Cat. Mus., Paris") and probably one of the 

 original specimens). Tahiti and Nicobars (Heller). 



3. 0. urvillei Guerin. 



Ocypoda urvillei Guerin, Voyage Cofiuille, Crust, p. 9, PI. I, f. 

 1 (1836), Edw. Hist. Crust., H, p. 49 (1837), Ann. Sci. Nat. HI, 

 xviii, p. 141 (1852), Owen in Beechey's Voyage Crust., p. 80 (1839;, 

 Dana, U. S. Ex. Exp. Crust., 328, PI. XX, f. 5 (1852). 



Carapax wider than long, superior margin of orbit sinuate, 

 angles acute. Ej-es moderate, ocular spines short, extending only 

 to angles of orbit. Meros of larger cheliped rounded above, its 

 two other margins denticulate. Carpus with a strong internal 

 spine. Hand externally granulate, serrate above and below ; the 

 stridulating ridge nearly straight, a little remote from the fingers 

 and extending from the lower margin of the hand two-thirds of 

 the wa}' to the upper. (Guerin.) 



Ta/u'^i (Guerin) ; Me Bouron (Edw.) ; Sanduoich Is. (Dana). 



4. 0. macrocera Edw. 



Ocypoda macrocera Edw. Hist. Nat. Crust., II, 49 (1837), Ann. Sci. Nat. 

 IV, xviii, p. 142 (1852), Heller, Novara Crust., p. 142 tl8G7). 



Orbits wide, oblique, angle obtuse, ej^es with a spine as in 0. 

 ceratophthahna. Larger hand very short, broad and a little 

 spinose above ; its palmar portion broader than long. The fingers 

 of the smaller hand lamellate and very broad at their extremities. 

 Ambulatory feet roughened above. (Edw.) 



E. Indies, Pondiclierry, {?] Brazil (Edw.) ; Tahiti, Nicobars (Heller). 



5. 0. gaudichaudi Edwards et Lucas. 



Ocypoda gaudichaudi Edw. et Lucas in D'Orbigny's Voyage, Crust., 

 p. 26, PI. XI, f. 4 (1843', Edw. Ann. Sci. Nat. Ill, xviii, 142 (1832), 

 Nicollet in Gay's Chili, Zool. Ill, p. 163 (1849), Stimpson, Ann. N.Y. 

 Lye. Nat. Hist., VII, p. 61 (1859) ; Smith, Rep. Peab. Acad. Sci., 

 Ill, p. 91 (1871) ; Streets, Proc. Phila. Acad., 1872, p. 240, 



Carapax longitudinall}- strongly arcuate, distal portion of front 

 nearl}^ vertical. Superior border of orbit sinuate internally, its 



