188 BULLETIN 129, UNITED STATES NATIONAL MUSEUM 



Chelipeds rather small and weak; the first pair of walking legs 

 exceeds them by more tKan the length of its dactyli. 



Color. — Orange red (Hay). 



Measurements. — Ovigerous female (15183), extreme length of cara- 

 pace, 22.7; length from posterior margin to line between anterior 

 margins of supraocular elevations, 10.3; width of carapace, 10.8 mm. 



Range. — Off Cape Lookout, North Carolina, to Barbados; 90 to 

 148 fathoms. 



Material examined. — 



Gulf Stream, 30 miles due S. of Cape Lookout Lightship, North 

 Carolina; about 100 fathoms; FisTi Hawk; 2 males, 2 females (51071), 

 1 male (50520). 



Off Cape Fear, North Carolina; lat. 33° 20' 00" N.; long. 77° 05' 

 00" W.; 90 fathoms; gy. S.; temp. 65.8° F.; April 2, 1885; station 

 2418, Albatross; 1 female, ovigerous (15183). 



SE. by E. M E. of Sand Key, Florida; 90 fathoms; J. B. Henderson; 

 1 young female (50519). 



Off Barbados: Off Sandy Bay; 100 fathoms; December 29-30, 

 1871; Hassler Exped.; 1 female, holotype (2019, M. C. Z.). Lat. 

 13° 03' 50" N.; long. 59° 37' 05" W.; 94 fathoms; Co. brk. Sh.; 

 temp. 61° F.; Mar. 5, 1879; station 276, U. S. C. S. S. Blalce; 1 speci- 

 men (2886, M. C. Z.). 



SPHENOCARCINUS AGASSIZI Rathbun 



Plate 63; plate 223, figs. 1 and 2 



Sphenocarcimis agassizi Rathbun, Proc. U. S. Nat. Mus., vol. 16, 1893, p. 

 231 (type-locality, Gulf of California, 14 fathoms; holotype, Cat. No. 

 17343, U.S.N.M.).— Faxon, Mem. Mus. Comp. Zool., vol. 18, 1895, p. 7, 

 pi. 1, figs. 3, 3a. 



Diagnosis. — Carapace with surface uneven, not deeply channeled. 

 Antero-lateral margin dentate. Rostrum shorter than postrostral 

 portion of carapace. 



Description. — Whole surface of body and limbs clothed with a 

 short, close pubescence. Rostral horns long, horizontal, contiguous. 

 A more or less broken, longitudinal, rounded ridge runs along the 

 median line of the carapace from the base of the rostrum to the intes- 

 tinal region, rising into a prominent tubercle on the gastric area. A 

 transverse flattened tubercle on the cardiac region and two roundish 

 ones on each branchial region. Antero-lateral margin of carapace 

 armed with four prominent tubercles or large teeth, counting the one 

 at the external orbital angle; these teeth increase in size successively 

 from the first to the last. Upper margin of orbit thickened and 

 produced into a blunt preocular tooth. Outer margin of ptery- 

 gostomian region furnished with two or three rounded tubercles. 

 On the merus of chelipeds two short spines al proximal end on superior 



