THE GBAPSOID CEABS OP AMEEICA. 117 



halfway to base; divisions cylindrical, acutely pointed, slightly 

 curved, the anterior one of each leg somewhat longer than the poste- 

 rior; dactylus 4 nearly straight, slightly compressed, sulcate above 

 and below and naked. 



First and second segments of abdomen narrower than third and 

 fused; third to sixth fused, slightly expanded at base, considerably 

 contracted at distal end; terminal segment small, nearly an equi- 

 lateral triangle. Appendages of first segment reach almost to ter- 

 minal segment, and are straight for basal two-thirds, terminal por- 

 tion turned sharply outward at obtuse angle; basal portion hairy 

 along outer edge, terminal portion on both edges. (Smith.) 



Description of female. The female resembles the male. The 

 postero-lateral margin of carapace is a little concave. The abdomen 

 covers the width of the sternum but 

 does not quite reach the extremity; 

 all segments free, second nearly twice 

 as long as first, third, fourth, fifth, 

 and sixth of subequal length and 

 each twice as long as second ; seventh 

 triangular, one-third as wide and 

 two-thirds as long as sixth, sides 

 sinuous. 



Color. In alcohol, dirty white; Pio. 65. DISSODACTTTUS NTTIDTTS, 



carapace marked with irregular, **^C2ttia>.x 

 transverse bands of purplish brown, and divisions of dactyli of first 

 and third legs tipped with dark brown. (Smith.) 



Measurements. Male holotype, length of carapace 4.7, width of 

 same 5.1 mm. Female (22113), length of carapace 5.5, width G mm. 



Range. From Santa Maria Bay, Lower California, Mexico, to 

 Peru. To a depth of 5J fathoms. 



Material examined. 



Off Santa Maria Bay, Lower California; in boat dredge; Mar. 18, 

 1911; Albatross; 3 males, 1 female (49229). 



Off Abreojos Point, Lower California; lat. 26 42' 30" N.; long. 

 113 34' 15" W.; 5J fathoms; gn. M.; May 4, 1888; station 2S35, 

 Albatross; 2 females (22113). 



Bay of Sechura, W. of Matacaballa, Peru; about 5 fathoms, in 

 trawl ; Apr. 8, 1907; R. E. Coker, collector; reed, from Peruvian Gov- 

 ernment; 1 female (40447). 



DISSODACTYLUS MELL1TAE (Rathbun). 



Plate 28, figs. 7 and 8. 



EchinopJiiJits mcJlitne RATHBTTN, Amer. Nat., vol. 34, 1000, p. 590 (trpe- 

 lorality. Ponsncola, Florida, on ilcllita testudinata; holotype, Cat. No. 

 23434, U.S.N.M.). 



