PART 1 GARTH : PACIFIC OXYRHYNCHA 57 



externally; first movable segment narrow at base, widening distally into 

 a remarkable external flange extending almost as far anteriorly as the 

 end of the similarly broadened second free segment, outer margin hairy. 

 (Plate A, fig. 4) Ischium of third maxilliped narrowly rectangular, inner 

 margin spinulous and hairy; merus equilaterally triangular, deeply 

 notched inwardly for the reception of the palpus, externally broadly 

 produced, a line of hairs parallel to its anterior margin. 



Male chelipeds inflated ; merus cylindrical, narrowing towards distal 

 extremity ; carpus with a faintly suggested crest ; manus smooth, com- 

 pressed, and crested, an external row of hairs just below crest and 

 sparse single hairs elsewhere, tapering distally, digital portion occupying 

 only about one-third of total length ; fingers slender, pointed, meeting 

 without gape, tips crossing, pollex with a sinuous cutting edge, dactylus 

 without a tooth, a few clusters of hairs on inner surfaces. 



Walking legs short, stout, nongranulate, hairy, with clusters of 

 hooked hairs on anterior margins of merus and carpus of all but the 

 last; length of legs decreasing regularly and gradually from first to 

 last; dactylus of first leg almost as long, of fourth leg fully as long as 

 its propodus, dactyli curved, tips horny. 



Male abdomen with seven free segments, broadest at base of third, 

 narrowest at base of sixth, broadening slightly at middle of sixth seg- 

 ment, then narrowing to the triangular tip. Male first pleopod with tip 

 pointed, a minute, rounded lateral projection. 



The female of the species is unknown. 



Measurements: Male neotype: length 5.0 mm, width 3.9 mm, 

 rostrum 0.5 mm, eyestalks 1.1 mm, cheliped 5.0 mm, chela 2.0 mm, 

 dactyl 0.8 mm. 



Remarks: Considering that Stimpson's figure belies his description 

 as to narrowness, the specimen characterized above and proposed as 

 neotype of Eucinetops rubellula may be regarded as fulfilling his descrip- 

 tion of the male of E. lucasi (which became the type of Rathbun's 

 species) in all particulars except the rostral horns, which are rounded, 

 rather than acutely pointed. Being larger (8 mm as against 5 mm), 

 Stimpson's specimen was undoubtedly more mature, and so presented to 

 better advantage the larger cheliped with its more compressed and 

 crested manus. The red patch on the dactyls of the ambulatory legs is 

 wanting, and in the opinion of this writer should not have been con- 

 sidered diagnostic, for Stimpson's specimen, if extant, would no longer 



