THE GBAPSOID CRABS OF AMEBICA. 125 



Cbeliped roughened with a few faint rugae, a small tooth at inner 

 angle of carpus, upper margin of propodus acute; propodus twice as 

 long as wide, straight above, sinuous below, fingers slightly deflexed, 

 stout, shutting close together, tips incurved, a minute tooth near base 

 of dactyl. 



Legs slender; merus joints dilated slightly; propodus tapering a 

 little toward distal end; dactyls 

 1, 2, and 3 subcylindrical, little 

 curved, ending in two short un- 

 equal spines, the smaller not in the 

 same plane as the longer, but be- 

 low it; posterior margin armed 

 with two rows of spinules, a few of 

 the same also on the corresponding 

 margin of the propodus. Fourth 

 dactylus straighter, simple, not 

 bifurcate, both margins spinulous, Fl - 7i. DISSODACTTWS ALCOCKI, uw 



, OF MALE rAUATYI'E, X 10. 



as also margins of propodus and 



carpus. Male abdomen with segments 1 and 2 fused, 3 to 6 inclusive 

 fused and with convex margins, 7 triangular with blunt tip. Female 

 abdomen with segment 1 short, half as long as 2 ; 3, 4, 5, and 6 incom- 

 pletely fused, 7 broadly triangular, half as wide as C. 



Measurements. Female (23447), length of carapace 4.2, width 

 5.8 mm. Male smaller, too damaged for measurement. 



Material examined. Gulf of Mexico, off Delta of Mississippi 

 River; lat. 29 24' 30" N.; long. 88 01' 00" W.; 35 fathoms; yl. S. 

 bk. Sp. ; Mar. 4, 1885; station 2388, Albatross; 1 male, 1 female 

 holotype (23447). 



DISSODACTTLUS CALMANI.* new pecies. 



Plate 28, figs. 5 and C. 



Type-locality. Grecian Shoals, Hawk Channel, Florida; 2 fath- 

 oms; station 74G9, Fish Ilawlc; 1 female (Cat. No. 49233, U.S.N.M.). 



Diagnosis. Carapace sharply pentagonal, covered with rugae; 

 antero-lateral margins dentate. Dactyl of legs 1 to 4 bifurcate, and 

 with a marginal line of spinules. Palp of outer maxillipeds 3-jointed. 



Description of female. Appearance quite unlike those above de- 

 scribed. Carapace pentagonal, deflexed in front of lateral angles, al- 

 most flat behind them, antero-lateral margins short, slightly convex, 

 dentate, postero-lateral margins long, straight, and posteriorly con- 

 verging, posterior margin sinuous; dorsal surface covered with short, 



t Named (or Dr. W. T. Caiman. British Museum, London. 



