OXYSTOMATOUS AND ALLIED CRABS OF AMERICA 239 



HEPATUS KOSSMANNI Neumann 



Plate 72, Figures 3, 4 



Hepatus kosmanni ^8 Neumann, Catalog der Podophthalmen Crustaceen des 

 Heidelberger Museums, p. 28, 1878 (type locality, west coast of America; 

 type in Heidelberg Mus.)- 



Hepatus kossmanni Rathbun, Proc. U. S. Nat. Mus., vol. 38, p. 593, 1910 (part; 

 Panama Bay only); Proc. California Acad. Sci., ser. 4, vol. 13, p. 374, 1924. 



Diagnosis. — Carapace covered with narrow stripes of reddish color 

 parahel to the arcuate anterolateral margin. Front not advanced 

 beyond the line of the suborbital cavities. Upper margin of cavities 

 forming not an angle, but a regular curve with the anterolateral 

 margin. Two large tubercles on fourth abdominal segment of male. 



Description. —Similar in shape to H. princeps, but carapace a httle 

 narrower and more strongly arched. Front truncate, not dentate 

 and not projectmg beyond the suborbital area, which is lower and 

 wider than in princeps and its upper border prominently granulate 

 forming no angle with the lateral margin of carapace, as in princeps. 

 Anterolateral margin finely denticulate, the denticles not formed 

 into teeth except at the posterior ends of the margin. Punctae of 

 dorsal surface visible to naked eye; eight clusters of tubercles, three 

 gastric, one cardiac, and two on each branchial region, the anterior 

 one elongate and arcuate. 



The male abdomen has on the fourth segment two large smooth, 

 prominent tubercles, which occupy almost the entire width; the 

 sixth segment tapers more gradually than in princeps. The manus 

 has three subrectangular teeth on upper margin separated by closed 

 fissures; in princeps these teeth are triangular. The lower margin 

 of the chela is more sinuous and the fixed finger more deflexed than 

 in the allied species. 



Color. — Narrow reddish stripes are parallel to the arcuate antero- 

 lateral margin. 



Measurements.— Male (40712), length of carapace 50, width 70, 

 greatest height of body 30 mm. 



Eange.— West coast of Mexico to Ecuador; 2 to 25 fathoms. 



Material examined. — See table 77, page 243. 



28 Named for R. Kossmann. 



