THE GRAPBOID CRABS OF AMERICA. 119 



Color.— Ughi, with .scanty dark niottlings which persist in alcohol 

 and are then of a purplish color. ..,, . 



Measureme7iis.-M^\e (40271), length of carapace 2.9, width of 

 same 3.5 mm. Female ovig. (40272), length of carapace 3.3, width 



of same 4.5 mm. ,. „•- 



HaUtat— Clings to the outside of key-hole urchin, MelMa qum- 

 guesperforata^M. testudmata, and the sand-dollar, Echinamchnius 



^^ToMje.—Yvom Vineyard Sound, Massachusetts, to Pensacola, 



Florida. 



Material examined. 



Off Menemsha Bight, Marthas Vineyard, Massachusetts; 1 speci- 

 men (U. S. Fisheries Lab.. Woods Hole). 



Western part of Vineyard Sound, Massachusetts; IH fathoms; 

 1908; F. B. Sunmer; 1 specimen (U. S. Fisheries Lab., Woods Hole). 



Nanagansett Bay, Rhode Island: Beaver Tail Light S. E. by S., 



1 mile; 8^ fathoms; S. Sh.i x\ug. 6. 1880; station 770. Fhh Hawk: 



2 males, 3 females, ovig. (40271). 



Narragansett Bay; E. of Brentons Reef Lightship; 8|-10 fathoms; 

 S. brk. Sh.; Aug. 23, 1880; stations 816-818, Fhh Hawk; 7 males, 

 10 females '(8 ovig.) (40272). ^ 



Beaufort, North Carolina: Union College Collection, No. <2c; 1 

 female ovig. (deposit. U.S.N.xM:, Cat. No. 42788). Union College 

 Collection, No. 57c; 1 female (deposit, U.S.N.M., Cat. No. 42789). 



Charleston, South Carolina: Feb. 8, 18.52: L. Agassiz: 15 speci- 

 mens (5729, M. C. Z.). 



Pensacola, Florida; on Mellita quinquesyerforata; J. 1?^. Benedict; 

 20 specimens (1 male is holotype) (23434). 



DISSODACTYLUS ENCOPEI Rathbnn. 



Phite 27, tigs. 1-4. 



DiHSodactylus encopei Rathbun, Bull. U. S. Fish Cornni., vol. 20 for 1900. 



pt 2 (1901) p. 22, text-fig. 5 a^e (type-locality, Stann Creek, 8S miles 



south of Belize, British Hondurns.; holotype. Cat. No. 23430, U.S.N.M.). 



DlHmihKtuhi^ ormiHclHlix IMoiikiua, Arch. Mus. Njio. Rio de .Taneiro, vol. 



11 1901 p 37. 1)1- ?' (type-locality. State of Rio Grande do Snl, on 



Encope, sp., probfibly E. ewamrtota: type h. Mus. Nac. Rio de Janeiro). 



Diagnosis.— Dorsal ridge short, oblique. Legs stout: dactyls 1-3 



bifurcate for less than half their length. Sides of segments 3-6 of 



male nbdomen convex: last segment an equilateral triangle. Palp of 



outer maxilliped 3-jointed. 



Description.— C^r^ipuce very wide, about one and four-tenths as 

 wide as long, posterior width but little less than greatest width. 

 Dorsal surfa^'ce nearly naked and polished, strongly convex fore and 



