THE SPIDER CRABS OF AMERICA 497 



Caldera, Chile; Mav 16, 1872; U. S. C. S. S. Hassler; 1 male 

 (1932, M. C. Z.). 



West coast of South America; 1858; Moller, collector; 1 specimen 

 (Copenhagen Mus.)- 



Guadeloupe; specimens described by A. Milne Edwards (Paris 

 Mus.). 



Additional record. — Bay of St. Elena, Ecuador (Nobili). 



MICROPHRYS PLATYSOMA (SUmpson) 



Plate 176, figs. 1 and 2 



Milnia platysoma Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, 1860, 

 p. 180 (tj'pe-locality, Cape St. Lucas; type not extant). 



Microphrys platysoma A. Milne Edwards, Crust. R6g. Mex., 1875, p. 62. — 

 Rathbun, Bull. U. S. Fish Comm., vol. 20, for 1900, pt. 2 (1901), p. 72 

 (part; not Atlantic specimens); Proc. U. S. Nat. Mus., vol. 38, 1910, 

 pp. 535 and 574, pi. 50, fig. 3 (part: only Lower California specimens). 



Pisoides ? celatus Lockington, Proc. California Acad. Sci., ♦ol. 7, 1876 

 (1877), p. 66 [4], (type-localities. La Paz, ^Slulcge Bay, Port Escondido, 

 San Jose Island, all in the Gulf of California; types not extant). 



Microphrys depressa Streets and Kingsley, Bull. Essex Inst., vol. 9, 

 1877, p. 103; not Fisheria depressa Lockington, 1877. 



Microphrys error Kingslet, Proc. Boston Soc. Nat. Hist., vol. 20, 187?, 

 p. 145 (type-locality. Lower California; type not extant). 



Diagnosis. — Two laminiform processes on antero-lateral wall of 

 carapace. Two branchial spines, one at lateral angle, the other in a 

 transverse line with same. A lobe on mar- 

 gin of basal antennal segment behind 

 antero-external spine. 



Description. — Carapace depressed, tu- 

 berculate and granulate; areole at inner 

 angle of branchial region very finely gran- 

 ulate; two laminiform processes on the 

 antero-lateral wall, one on the hepatic re- 

 gion, the other on the branchial region, the 



latter not projecting in an imbricated | /^ -'^ V-> 



manner. The surface of the hepatic proc- ' ^= . 



ess is in one plane, with the anterior end 

 acute and projecting fonvard; there may 

 be, however, at the middle of the upper ^^^ ho.-micropheys platysoma 

 edge a tubercle which projects outward. (20292), basal antennal article, 

 Betvreen the hepatic and branchial proc- 

 esses and below their level there is a spine; two branchial spines, one 

 of which is on the postero-lateral angle and the other farther in 

 but on the same transverse line. On the posterior margin there 

 is a row of tubercles which increase in size toward the middle, 

 those of the middle pair larger than the others. Rostral horns 

 slender, directed fonvard, about one-sixth the length of rest of 



