COMPLETE HAIG : EASTERN PACIFIC PORCELLANIDAE 71 



with about five spinules; dorsal crest more distinct than in males; 

 crest on posterior margin similar to that of males. Manus with a broad 

 median longitudinal crest extending to base of dactylus; outer margin 

 with a thin, smooth crest, unarmed in males, in females and young with 

 a row of spinules continuing nearly to end of pollex. Dactylus with a 

 strong ridge on dorsal surface; gape with a thick pubescence, produced 

 along proximal half or more of fingers into a long tuft. 



Walking legs covered with small granules. Merus with three longi- 

 tudinal crests, median one defined by two distinct grooves; anterior 

 margin with a row of small nodules, these crests and nodules more dis- 

 tinct in females and young; not armed with spines; that of leg 3 not in- 

 flated. Carpus nodulate at proximal and distal ends of posterior mar- 

 gin ; carpus and propodus with a low longitudinal crest. Last three seg- 

 ments with scattered tufts of short setae. 



Variations: In small males (up to about 8.5 mm in some cases, 

 although some smaller than this show the male characteristics), it was 

 observed that female characters were present, particularly the shorter 

 carpus and spinules on carpus and manus. One large male specimen had 

 a small left cheliped, evidently regenerated, and this cheliped was of 

 the female form although the rest of the specimen exhibited typical 

 adult male characters. 



Material examined: See Table 17. 



Measurements: Males, 6.0 to 11.8 mm; non-ovigerous females, 3.8 

 to 8.3 mm; ovigerous females, 5.8 to 9.3 mm. The female holotype 

 measures 9.2 mm in length, 10 mm in breadth; a male paratype, 10.5 

 by 10.8 mm. 



Color: Color in life chocolate brown. (Glassell, 1936) 



Ecology: Taken under stones in the littoral. The tide level was 

 not noted for Hancock Foundation specimens, but the type series was 

 collected at low tide. 



Ovigerous females have been collected in December, January, Feb- 

 ruary, and March. 



Remarks: This species is remarkable for its strongly nodulated 

 front and walking legs, and its sexual dimorphism. 



Range: Gulf of California, from San Felipe south to Punta Trini- 

 dad. 



