OXYSTOMATOUS AND ALLIED CRABS OF AMERICA H^) 



coarsely granulate than dorsum; edge of orbit denticulate; antennules 

 fitting snugly in their sockets; peduncle of antennae tipped with a 

 tubercle. Two tubercles below orbit. A deep sinus behind the 

 orbit continuous with the pterygostomian sinus. Endognath of 

 outer maxilliped with two longitudinal grooves. Chelipeds stout, 

 very coarsely granulate; merus short; carpus obliquely quadrilateral, 

 two lobes on outer margin, one at inner angle; upper surface of palm 

 broad, longitudinally hollowed, a lobe or tooth at either end of outer 

 margin; digits broad and thick, inclined slightly downward and 

 inward, prehensile edges meeting. Merus and carpus of first two 

 ambulatories spinulous on margins; dactylus longer than propodus; 

 second leg sensibly longer than first. The ischium, merus, carpus, and 

 propodus of fourth leg subequal in length, dactylus shorter. 



Measurements. — Male, holotype (67435), length and breadth 6 mm. 



Range. — Southern California. 



Material examined. — As follows: 



California: Off Brockway Point, Santa Rosa Island; 38 to 45 

 fathoms; April 15, 1904; station 4431, Albatross; 1 male, holotype 

 (67435), figured. Catalina Island; dredged; January 1863; J. G. 

 Cooper; 1 male (25866), figured. Off Point Loma; lat. 32°38'00" N., 

 long. 117°14'00" W., in trawl; November 3, 1907; Scripps Institu- 

 tion; 1 specimen (53958). 



CLYTHROCERUS GRANULATUS Rathbun 



Figure 31; Plate 33, Figures 5-8 



Cyclodorippe granulata Rathbun, Bull. Lab. Nat. Hist. State Univ. Iowa, vol. 4, 

 p. 293, pi. 9, fig. 1, 189<S (type locality, off Trinidad, B. W. 1., 73 fathoms; 

 type, U. S. N. M. no. 20510). 



Diagnosis. — Carapace and appendages densely granulate. Only 

 one lateral tooth or spine. Margins of carapace spinulous. Front 

 divided rouglily into three teeth. 



Description. — Superior and inferior surfaces closely and coarsely 

 granidate; lateral margins of posterior half fringed with minute, 

 slender spinules; slightly above and near the widest part of the cara- 

 pace a short, sharp spine. Rostral and orbital region depressed, 

 remainder of carapace swollen; brancliio-cardiac sutures deep. Front 

 sub triangular, divided into three blunt teeth by intervening depres- 

 sions; the two lateral teeth with finely spinulous edge, the median 

 tooth entire, although occasionally with a minute notch. A longi- 

 tudinal furrow leads backward from orbit; outside tins, the orbital 

 margin is transversely oblique, lower border more advanced and 

 transverse. A deep furrow borders the pterygostomian region; it is 

 very wide anteriorly and narrows to a point near the widest part of 

 carapace. 



