g4 BULLETIN 166, UNITED STATES NATIONAL MUSEUM 



Southern specimens are much larger than northern, and have the 

 carapace thickly covered wdth a short, soft pile, and the edge of the 

 front concealed by a fringe of short hair. 



Co/or.— Carapace salmon under dense cream-buff pubescence; 

 corneae gray; tips of fingers white; legs a light flame scarlet, darkest, 

 on dact3ds to lightest on proximal half of back of merus. (W. L. 

 Schmitt.) 



Measurements. — Male (66821), length of carapace to tip of sub- 

 median spine 26.3, width 27.8 mm. Female (66824), length of cara- 

 pace to tip of submedian spine 25.7, width 26.6 mm. 



Range. — Off Marthas Vineyard, Mass., to west Florida and Cuba; 

 60 to 315 fathoms. 



Material examined. — See table 24, page 83. 



ETHUSA LATA Rathbun 



Figure 19; Plate 24, Figure 1; Plate 25, Figure 1; Plate 28, Figure 3 



Ethusa lata Rathbun, Proc. U. S. Nat. Mus., voL 16, p. 258, 1893 (type locality, 



Gulf of California, 33 fathoms; type, U.S.N. M. no. 17483); vol. 21, p. 615, 



1898. 

 Aethusa pubescens Faxon, Bull, Mus. Comp. Zool., vol. 24, p. 160, 1893 (type 



locality, off Panama, 100 fathoms; type in M. C. Z.). 

 Aethusa lata Faxon, Mem. Mus. Comp. Zool., vol. 18, p. 35, pi. 6, fig. 1, la, lb, 



1895. 

 Diagnosis.— Eyest&lks very short, much stouter than cornea. 

 Dactyli of first and second ambulatories vertically compressed. 

 Appendages of second abdominal segment of male slender and 

 longer than those of first segment. 



Description. — Carapace broader than long, densely pubescent; 

 frontal margin ciliated; cer^ncal and cardiac sutures well marked; 



Figure 19.— Ethusa lata, female: Antennal and oral regioo, slightly enlarged. After Faxon. 



the narrow urogastric region much depressed. Of the frontal teeth 

 the subm.edian are more widely and deeply separated from each other 

 than from the lateral. The type of A. pubescens, the largest specimen 

 known, is an exception, the median sinus slightly shallower than the 

 lateral. Anterolateral tooth nearly as advanced as front. Eyes 

 very short and stout; cornea circular, directed downward. The 

 larger (right) cheliped of the male has a subglobular carpus produced 

 inwardly in a rounded lobe; chela oval, convex above and below; 



