CALIFORNIA STALK-EYED CRUSTACEA. 77 



Length of carapace, male 8.75 mm. 



Width of carapace, male 13.5 mm. 



Length of larger hand, male 19 mm. 



Length of carapace, female 7.75 mm. 



Width of carapace, female 12.25 mm. 



Described from Lockington's types (Cat. No. 3112) 

 in the collection of the California Academy of Sciences. 



West coast of Lower California (Lockington). 



This species differs from U. gibbosa (Smith) in having 

 the surface of the carapace even, with the branchial 

 regions not at all inflated, and in having seven, instead 

 of five, abdominal segments in the male. 



U. stenodactyla is reported from San Diego by Ort- 

 mann, who unites with this species gibbosa (Smith) 

 and speciosa Ives 1 . 



Genus Speocarcinus Stimpson. 



Carapace longitudinally convex both in front and behind, transversely 

 nearly plane; sides converging behind. The space between the outer ends 

 of the orbit exceeds one-half the width of the carapace. Antero-lateral 

 margins dentate. Ocular peduncles of moderate length; eyes small . 

 Orbits and antennae similar to those of Panopeus. Palate devoid of a 

 median elevation. Maxillipeds widely gaping; merus rather short and 

 bearing the palp at the summit. Chelipeds short and stout. Ambulatory 

 legs slender, smooth, with depressed, ciliated dactyls. Genital openings 

 of the male in the sternum. 



Abdomen of the male with the base much narrower than the last thoracic 

 sternum; third, fourth and fifth segments coalesced. 



Type. S. carolinensis STIMPSON. 



Speocarcinus calif orniensis (Lock.) 



Eucrate ? californiensis LOCKIXGTOX, Proc. Cal. Acad. Sci., Vol. VII, 1877, 



p. 33. 



Carapace strongly convex longitudinally, transversely plane, nearly 

 smooth above, but minutely granulated towards the pubescent margins. 

 Median region divided into three areas by pubescent sulci; a longitudinal, 

 pubescent line on the branchial regions which are separated from the 



i See Zool. Jahrb. Abth. f. Syst., Bd. X, 1897, p. 356. 



