THE CANCROID CRABS OF AMERICA 327 



LOPHOPANOPEUS DIEGENSIS Rathbun 



Plate 153, Figures 6, 7, and 10 



Lophopanopeus diegensis Rathbun, Amer. Nat., vol. 34, 1900, p. 137 (type-local- 

 ity, San Diego, 10 fathoms; type. Cat. No. 4281, U.S.N.M.); Harriman 

 Alaska Exped., vol. 10, 1904, p. 184, pi. 9, fig. 3. — Schmitt, Univ. California 

 Publ. ZooL, vol. 23, 1921, p. 245, text-fig. 146, pi. 37, fig. 5. 



Diagnosis. — Carpus of ambulatory legs with two large naked 

 tubercles on upper margin. Carpus of chelipeds with numerous, 

 mostly separated tubercles on exposed surface. Second antero- 

 lateral tooth slightly projecting. 



Description. — Carapace granulate on frontal and lateral regions, 

 granules arranged partly in lines. Frontal lobes deflexed, edge slightly 

 oblique and sinuous, outer tooth inconspicuous. Second antero- 



FiGURE 49.— Lophopanopeus diegensis, male, eolotype, carapace 11.4 mm. wide 



lateral tooth small, somewhat dentiform, directed toward orbit; 

 third, fourth, and fifth teeth prominent, carinate and subacute. 

 Suborbital and subhepatic regions granulate. 



Carpus of chelipeds with about 35 unequal, finely granulate tuber- 

 cles, irregularly placed, some of them forming lines. Hand bicarinate 

 above, inner carina with a small prominence at proximal end; a few 

 tubercles on upper part of inner surface; upper and proximal portion 

 of outer surface rough with fine granulated rugae. Dark color of 

 immovable fingers not running back on palm but ending obliquely on 

 minor chela. Carpus of legs with two prominent naked, truncate 

 tubercles on upper margin, by which this species may at once be 

 recognized; propodus of last one to three pairs with a smaller tubercle 

 near proximal end of upper margin. 



