COMPLETE HAIG : EASTERN PACIFIC PORCELLANIDAE 183 



Porcellana cristata H. Milne Edwards, 1837, p. 254 (type locality un- 

 known). Nicolet, 1849, p. 194. Cano, 1889, pp. 96, 99, 100, 260. 



P{orcellana] punctata?, Stimpson, 1858, p. 229. 



^Porcellana (cristata?), Boas, 1880, pi. 1, fig. 13; pi. 2, fig. 63; pi. 3, 

 fig. 122. 



Petrolisthes punctatus, Ortmann, 1897, pp. 277, 279. Rathbun, 1910, p. 

 599. Haig, 1955, pp. 42, 48, text-fig. 11. 



Pachycheles grossinianus, Porter, 1936a, p. 255, pi. 18. Not P. grossi- 

 manus (Guerin). 



Previous records: 



Peru. Ancon: Vettor Pisani (Cano). 



Chile. "Chile": (Guerin 1835). Iquique; Punta de Lobos; Montemar: 

 Lund Univ. Chile Exped. (Haig). Valparaiso: Favorite (Guerin 

 1838b); Vettor Pisani (Cano). San Antonio: (Porter). Talca- 

 huano: MCZ collection (Haig). 



Diagnosis: Carapace smooth, regions not distinct; front with three 

 rounded lobes; orbits rovinded, concave; carpus with a strong angular 

 lobe on proximal half of anterior margin, joining distal portion of mar- 

 gin in a broad curve. 



Description: Carapace very strongly convex front to back, smooth, 

 devoid of hairs; regions not distinct. Front strongly trilobate, lobes 

 rounded, median a little broader and more projecting than lateral lobes ; 

 in frontal view, median lobe showing a narrow, acute, strongly de- 

 flexed extension, present to a lesser degree on lateral lobes also. Orbits 

 rounded, deeply concave; outer orbital angle produced into a strong 

 pointed tooth. 



First movable segment of antenna smooth, with a low crest on an- 

 terior margin; second and third smooth or nearly so, with more pro- 

 jecting anterior crests; flagellum with vestigial hairs. Outer maxil- 

 lipeds smooth or punctate. 



Chelipeds smooth, devoid of hairs. Merus armed on anterior mar- 

 gin with a small rounded lobe. Carpus about one and a half times as 

 long as broad, a strongly projecting angular lobe occupying proximal 

 half of anterior margin, and joining distal portion of margin in a 

 broad curve; a smooth longitudinal crest on dorsal surface, and an- 

 other along posterior margin. Manus with a smooth longitudinal crest 

 extending to base of dactyl ; outer margin with a smooth crest. Fingers 

 smooth, gaping, crossing at tips; gape without pubescence. 



