PART 1 GARTH : PACIFIC OXYRHYNCHA 245 



than at tip of lobes and appreciably less than width between tips of 

 posterolateral lobes. Rostrum a third as long as the postfrontal part of 

 the carapace and half as broad as long, lateral margins raised, extremity 

 incised for about one-fourth of its length to form two rounded lobes. 

 Eyestalks flattened. 



Merus of maxillipeds slightly notched at anterointernal angle [this 

 is not borne out by text-fig. 60] ; first article of palp flattened, angular, 

 last two articles small and slender, hidden behind the merus. 



Carpus of cheliped nodose, merus and manus nodose at distal articu- 

 lations; two low tubercles on upper margin of merus; propodal finger 

 strongly deflexed, dentate; fingers stout, the dactylus with a basal tooth 

 and near the tip a few smaller teeth. Dactyli of legs strongly falcate, 

 finely dentate, the digital tooth of the propodus strong and with hairy tip. 



A row of five tubercles on first segment of female abdomen. (Rath- 

 bun, 1925, p. 161) 



Material examined: 24 specimens from 7 stations, divided as follows: 

 (See Table 49) 



U. S. National Museum material : 23 specimens from 6 stations rep- 

 resenting one Peruvian and two Ecuadorean localities, collected by Waldo 

 L. Schmitt. Also the female holotype of Eupleurodon peruvianus. 



Hancock expeditions material : A single female specimen from Lobos 

 de Afuera Islands, Peru, Velero III station 391-35. 



Measurements: Largest specimen, a male: length 9.5 mm, hepatic 

 width 6.45 mm, branchial width 6.45 mm, rostrum 2.7 mm, width 1.5 



mm, cheliped , chela 3.4 mm, dactyl 1.6 mm, first walking leg ca. 



8.5 mm, fourth walking leg ca. 4.5 mm. Ovigerous female: length 7.3 

 mm, hepatic width 5.25 mm, branchial width 5.45 mm, rostrum 1.8 mm, 



width 1.0 mm, cheliped , chela 1.7 mm, dactyl 1.0 mm. (The rigidity 



of the specimens prevents accurate toto measurements of cheliped or leg 

 lengths.) 



Habitat: From rocks between tide lines. (Coker) 



Depth: Intertidal. 



Breeding: Ovigerous females were encountered at Santa Elena Bay, 

 Ecuador, by W. L. Schmitt in September, and at Ferrol Bay (Chim- 

 bote), Peru, by R. E. Coker in March. 



Remarks: On the evidence of the specimens now before him, and of 

 those previously studied at the U. S. National Museum, including types, 

 the writer is prepared not only to transfer Epialtus peruvianus Rathbun 

 (1923a) to the genus Eupleurodon, as suggested in a previous paper 

 (Garth, 1946, p. 378), but to synonymize with it the existing Eupleuro- 



