no. 1766. STALK-EYED CRUSTACEA OF PERU— RATH BUN. 559 



PETROLISTHES SPINIFRONS (Milne Edwards). 



Plate 48, fig. 5. 

 Porcellana spinifrons Milne Edwards, Hist. Nat. Crust., vol. 2, L837, p. 256. 



Similar in shape to the preceding. Carapace rougher, areolated; 

 antero-lateral margin denticulated. Front quinquedentate, middle 

 tooth largest and most prominent, intermediate pair on lower level. 

 Orbits better defined and eves smaller than in P. armatus. Pedunc- 

 ular segments of antenna tuberculate; flagellum very long. Maxil- 

 lipeds also lone;. Chelipeds shorter than in the preceding; a strong 

 tooth at middle of anterior margin of wrist; palms as broad as long; 

 fingers as long as palm. First three pairs of legs stout; fourth pair 

 shorter and a little broader than in P. armatus. 



Width 10 mm. 



Pescadores Islands, February 12. Small, dark purple crab. 

 Distribution. — Peru ; Chile. 



PACHYCHELES GROSSIMANUS (Guerin). 



Plate 46, fig. 5. 



Porcellana grossimana Guerin, Bull. Soc. Sci. Nat. France, L835, p. L16; Mag. 

 de Zool., vol. 8, 1838, cl. 7, pp. 6, 8, pi. 26, fig. 3. 



Allied to Petrolisihes. Carapace ovate, as broad as long, convex, 

 faintly rugose. Front bluntly tridentate, orbits shallow, eyes large. 

 First article of antenna reaches margin of carapace; flagellum longer 

 than carapace. Maxillipeds visible in dorsal view. Chelipeds very 

 broad and thick, rough and setose; wrist broader than long, two 

 teeth on anterior margin; palms as broad as long; outer margin of 

 propodus very convex; fingers gaping, densely hairy within. First 

 three pairs of legs stout and hairy; fourth pair slender, inflexed. 



Width 8 to 12 mm. 



Taken in trawl, Ray of Sechura, west of Matacaballa, depth about r > fathoms, April 

 8, 1907. 



Taken from seaweed, Chincha, North Island, June IS, 11107. 



Distribution. — Peru ; Chile. 



MUNIDA COKERI, new species. 



Plate 53, fig. 5. 



Grimotai gregaria Guerin, Vby. Coquille, atlas, 1X30, pi. 3, fig. I (colored); vol. 

 2, pt. 2, 1831, p. 32 (not Galathea gregaria Fabricius, L793). 



Carapace oblong; abdomen partly extended; chelipeds elongate, 

 longitudinal, as are also the first three pairs of legs; last pair of legs 

 very slender, inflexed. Cervical suture deep; numerous transverse 

 stria3 bordered by setse; rostrum a slender spine, longer than eyes, 



