80 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 24 



supraocular spine; inner orbital angle broad and rounded, slightly to 

 distinctly produced, the front in the latter case appearing distinctly tri- 

 lobate. Outer orbital angle only slightly produced. No epibranchial spine. 

 Carapace naked. 



First movable segment of antenna with a strongly projecting lobe; 

 second and third nearly smooth; flagellum with short hairs. Outer 

 maxillipeds punctate or lightly rugose. 



Chelipeds finely granular, appearing almost smooth, devoid of hairs. 

 Merus with a strongly projecting, distally directed, rounded lobe on 

 anterior margin. Carpus two and a half to three times as long as wide, 

 margins subparallel; a low, obliquely rugose crest on posterior margin, 

 ending distally in a sharp tooth. Manus long and slender, with a thin 

 outer margin. Fingers long, curved ; gape with a thick pubescence ex- 

 tending nearly to tips of fingers, not produced into a longer tuft proxi- 

 mally. 



Walking legs smooth or punctate ; merus not inflated, not armed 

 with spines, naked or with a few scattered setae on margins; other seg- 

 ments covered with long setae. 



Variations: In some specimens the inner orbital angles appear only 

 very slightly produced; in others they are very strongly produced, so 

 that the front is distinctly trilobate. In long series of specimens it was 

 observed that the inner orbital angles show a gradation between these 

 two extremes. 



Material examined: See Table 21. 



Measurements: Males, 2.7 to 10.2 mm; non-ovigerous females, 2.7 

 to 7.8 mm; ovigerous females, 3.7 to 8.0 mm. The type was reported to 

 be .44 inch in length by .41 inch in breadth (about 11.0 by 10.4 mm). 



Color: Carapace dull bluish green with evenly placed small white 

 spots. Eyes reddish brown. Antennules yellow green with flame scarlet 

 tips. Antennae dull chrome yellow. Chelae and ambulatory legs same 

 color as carapace but a little lighter. Small scarlet area at the base on 

 inner side of movable finger. Tips of fingers light orange. Dactyls of 

 ambulatory legs dull orange. Ventral side dull bluish green. Inner distal 

 portion of maxillipeds brilliant Matthews blue. (Petersen, of a live spec- 

 imen from Isla Angel de la Guarda) 



In alcohol, some specimens show small orange spots on the chelipeds 

 and walking legs. A characteristic marking, found in some but not all 

 individuals, is a broad black stripe on the propodus of the walking legs; 



