COMPLETE HAIG: EASTERN PACIFIC PORCELLANIDAE 37 



Petroltsthes brasiliensis S. I. Smith, 1869, p. 38 (new name for Porcel- 

 lana boscti of Dana; see reference above). 



Petroltsthes danae, Kingsley, 1880, p. 405, footnote. 



Petroltsthes galathinus, Nobili, 1897, p. 4. Ortmann, 1897, p. 283. Rath- 

 bun, 1910, p. 600. Schmftt, 1935, p. 186. Not Boone, 1931, p. 155, 

 text-fig. 9; 1932, p. 45; probably not Hult, 1938, p. 10. 



Previous Pacific records: Pacific Panama. "Panama": Sternbergh 

 and Rowell (Stimpson 1859). "Panama" [City?]: Albatross (Faxon). 

 Isthmus of Panama: J. A. McNeil (Streets). TslaTaboguilla: (Schmitt). 



Diagnosis: Carapace with strong, transverse, piliferous striations, 

 not continuing across metabranchial regions ; a single epibranchial 

 spine ; front triangular ; carpus about twice as long as wide, anterior 

 margin with four broad, serrate-edged teeth, and surface with oblique 

 striations; manus with obh'que striations; merus of walking legs with 

 a row of spines on anterior margin, that of legs 1 and 2 spined at 

 posterodistal angle. 



Description: Carapace covered with strong, transverse, piliferous 

 striations, scarcely interrupted at the grooves separating the various 

 regions, the latter well marked ; frontal region granulate, metabranchial 

 regions finely plicate. Front triangular, truncate at tip, with a deep 

 median sulcus usually filled with a short pubescence; supraocular spine 

 present, not distinct in large specimens. Postorbital angle produced into 

 a small spine-tipped tooth. A single strong epibranchial spine. 



First movable segment of antenna with a spine-tipped, lamellar lobe; 

 second and third lightly rugose; flagellum naked. Outer maxillipeds 

 rugose. 



Chelipeds covered with strong piliferous striations, continuing obli- 

 quely and almost unbroken across carpus and manus, broken up into 

 series of shorter rugae on fingers. Merus with a strong rugose lobe on 

 anterior margin, having the form of a serrate-edged tooth in small 

 specimens. Carpus about twice as long as wide, anterior margin with 

 four broad, strong, serrate-edged teeth ; no median longitudinal crest ; 

 a row of spines on posterior margin. Manus broad, flattened, rugae 

 on outer margin produced into spines in smaller specimens; outer 

 margin often fringed with plumose hairs. Gape of fingers with a thick 

 pubescence, somewhat elongated to form a short tuft. 



Walking legs rugose ; anterior margin of merus with a fringe of 

 plumose hairs, all segments covered with long, non-plumose setae; an- 

 terior margin of merus of leg 1 with six to nine spines, of leg 2 with 



