544 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Material examined. — Cape St. Lucas; John Xantus; 1 male, 1 

 female, cotypes (1256, M. C. Z.). 



Ecuador: South side of Point Santa Elena; September 17, 1926; 

 W. L. Schmitt; 1 female (60790). 



OZIUS AGASSIZII A. Milne Edwards 



Plate 221, Figures 3 and 4 



Ozius agassizii A. Milne Edwards, Crust. R6g. Mex., 1880, p. 279, pi. 55, figs. 

 1-ld (type-locality, Panama; type in M. C. Z.)- — Nobili, Boll. Mus. Zool. 

 Anat. Comp. Univ. Torino, vol. 16, 1901, no. 415, p. 36. — Boone, Zoologica, 

 vol. 8, 1927, p. 225, text-fig. 83. 



Diagnosis. — Minor cheliped very slender, especially the fingers. 

 Carapace and chelipeds tuberculate. Lateral margin of carapace 

 thick. 



Description. — Approaches the two preceding in form of carapace 

 but is less regularly ovoid. The anterior surface bears instead of 

 depressions small unequal tubercles, which give it a very rough appear- 

 ance. Kegions indistinct. An oblique granulate line runs from the 

 lateral angle to the gastric region. Front quadrilobate, the lobes of 

 the median pair very broad, subtriangular and blunt. Antero-lateral 

 borders thick, not margined as in reticulatus, entire in front, two 

 shallow teeth at the widest part; sometimes an indication of another 

 tooth in front of, or behind these two. 



Chelipeds very unequal, the minor manus only half as high as the 

 major; both are swollen and approach the cylindrical. Merus, 

 carpus, manus and half of dactylus very rough with tubercles, which 

 form irregular lines above the manus. Fingers long and slender, 

 those of major chela gaping; those of minor chela extremely long, 

 exceeding palm in length, and extremely slender, fitting tight together; 

 teeth minute. 



Color. — Uniform red brown, or a rather bright carmine band on the 

 anterior and antero-lateral regions. (Nobili.) 



Measurements. — Female (33329), length of carapace 13.1, width of 

 same 21.5, fron to-orbital width 11, width of front 5.4 mm. 



Range. — From Costa Rica to Ecuador (Nobili). 



Material examined. — Costa Rica; Punta Arenas; 3 large specimens 

 (Copenhagen Mus.). 



Panama: Pacific shore of Panama; low tide, rocks; May-July, 1924; 

 E. Deichmann; 1 male, 1 ovigerous female (60788). Taboga Island : 

 July, 1924; E. Deichmann; 1 male (60789). May, 1927; Melbourne 

 Ward; 1 male, 1 female; returned. Taboguilla Island; between tide 

 marks; October 31, 1899; Albatross; 2 males, 4 females, 7 young 

 (33329), 2 males, 2 females, 3 young (M. C. Z.). Perico Island; 

 Oct. 26, 1904; Albatross; 1 male, 1 young (33288). 



Galapagos Islands: James and Charles Islands; Hassler Expedition; 

 specimens in M. C. Z. Chatham Island; Dr. W. H. Jones, U. S. 



