THE CANCROID CRA.BS OF AMERICA 465 



very flat posteriorly, anterior third deflexed. When the felt is removed 

 the regions are fairly well indicated, the urogastric region is depressed, 

 the grooves forming an H in middle of carapace are especially deep. 

 Fine granules are scattered sparsely on the antero-lateral, postero- 

 lateral and posterior portions. Antero-lateral teeth shallow, blunt; 

 first, or E of Dana, long and low, second and third subequal, fourth 

 smallest. Carapace very nearly as wide at last tooth as at penulti- 

 mate. Fronto-orbital distance a little over half as great as width of 

 carapace; front, between antennae, less than one third the carapace 

 width, separated from orbital border by a deep groove but without 

 emergination ; anterior margin of front bilobed, median notch V 

 shaped. 



Carpus and manus of subequal chelipeds covered with granules; 

 fingers light colored; propodal finger horizontal except at tip where it 

 crosses the dactylus, gape narrow. Ambulatory legs smooth. 



Measurements. — Female holotype, length of carapace 4.3, width 

 5.6, fronto-orbital width 3.1, width of front 1.6 mm, Male holotype 

 of vestitus, length of carapace 4.6, width 6.4 mm.; female paratype, 

 length 5.2, width 7.6 mm. 



Range. — Curasao; Cape St. Roque, Brazil. 



Material examined. — Spanish Port, Curagao; 1920; C. J. van der 

 Horst collector: April 16; 2 males, 2 females (57002), 4 females 

 (Amsterdam Mus.). May 6; 3 males (1 is holotype of X vestitus), 

 4 females (Amsterdam Mus.). 



Off Cape St. Roque, Brazil, lat. 6° 59' 30" S., long. 34° 47' 00" 

 W., 20 fathoms, brk. Sh., temperature 79° F., December 16, 1887, 

 Albatross; 1 female, holotype (21579). 



Genus PARAXANTHIAS Odhner (part) 



Liomera (part) Dana, Amer. Journ. Sci., ser. 2, vol. 12, 1851, p. 124. 

 Xanthodes (part) Dana, Proc. Acad. Nat. Sci. Philadelphia, vol. 6, 1852, p. 73. 

 Xanthias (part) Rathbcn, Proc. Biol. Soc. Washington, vol. 11, 1897, p. 165. 

 Paraxanthias Odhner (part), Goteborg's K. Vet. Handl., Fjarde Foljden, vol. 29, 

 No. 1, 1925, p. 85; type, P. nofatus (Dana). 



Carapace broad, suboval or subhexagonal, convex in both direc- 

 tions, regions well delimited. Antero-lateral margins thick, dentate, 

 with four divisions not counting the orbital angle which may be 

 confluent with the first lobe. Frontal lobes obliquely cut, with outer 

 angles produced and separated by an emargination from the upper 

 orbital margin. Basal antennal article short and broad, merely touch- 

 ing front; flagellum lodged in orbital hiatus. Anterior border of 

 merus of outer maxilliped a little obHque. Chelae distinctly unequal, 

 both stout; fingers rather short, the movable one strongly curved. 

 Male abdomen with third to fifth segments fused. 

 79856—30 31 



