Figube 82.- — Munida irrasa Milne Ed- 

 wards. Animal in dorsal view (after 

 Milne Edwards and Bouvier, 1897). 



fingers agape at base; merus with rows of spines 

 continued on carpus and hand. First pair of 

 walking legs reaching proximal end of hand. 



Abdomen without spines. 



Measurement*. — Length of carapace: males, 11 

 mm. ; females, 14 mm. ; smallest ovigerous female, 

 4 mm. (Chace, 1942). 



Habitat.— Thirty to 260 fathoms. 



Type locality. — Not designated with certainty. 



Known ranf/e. — Off Cape Lookout, N.C. ; 

 Florida through AVest Indies to Grenada; Gulf 

 of Mexico to Colombia and Venezuela; "600 mi. 

 off St. I >avids, Bermuda." 



Remarks. — Ovigerous females have been taken 

 off southeast Florida in July, and off North Caro- 

 lina in September. The rhizocephalans Cyphosac- 

 cus chacei and Boschmaia iminidicola were re- 

 ported from M. irrasa by Reinhard (1958). 



Family Porcellanidae 



General form crablike. Carapace well calcified, 

 depressed, regions usually not well defined; front 

 often prominent but never with rostrum greatly 

 projecting beyond eyes. Antennae inserted ex- 

 ternal to eyes, with three movable articles and a 

 flagellum. Basal articles of antennules broad. 

 Outer maxillipeds too large to be contained in 

 buccal cavity. Chelipeds moderately elongate, 

 usually broad and depressed. First, second, and 

 third walking legs well developed; last leg feeble, 

 reduced in size, inflexed and resting on carapace. 

 Abdomen broad, symmetrical, composed of seven 

 segments, bent under and held closely against 

 thorax ; males with a pair of pleopods on segment 

 two, sometimes rudimentary or absent, females 

 with a pair of pleopods on segments three, four, 

 and five, those on three sometimes reduced or ab- 

 sent. Telson composed of five or seven well-calci- 

 fied pieces (Haig, 1960). 



KEY TO GENERA AND SPECIES IN THE CAROLINA 



(Modified after Chace. 1942) 

 a. Form elongate, "hippalike" ; telson much longer than 



broad Euoeramus praelongus (p. 109). 



aa. Form less elongate ; telson usually broader than long, 

 never much longer than broad. 



b. Lateral wall of carapace broken up into two or more 

 pieces, separated by membranous interspaces; front 

 triangular or transverse in dorsal view, never with 

 projecting teeth ; carapace subquadrate. 

 c. Carapace with numerous transverse tufts of setae; 

 chelipeds and legs hairy 



Paohyoheles pilosus (p. 10S). 

 cc. Carapace relatively smooth, not hairy ; chelipeds 

 deeply ridged and eroded, not hairy 



Pachychrh x rinniiiiuuia (p. 10s I . 

 bb. Lateral wall of carapace nearly always entire; if 

 not, front distinctly tridentate in dorsal view; cara- 

 pace not subquadrate. 



c. Basal antennal article small, not joining margin 

 of carapace, so thai movable articles have free ac- 

 cess to orbit Petroliathes golathinus i p. 107). 



CC. Basal antennal article strongly produced for- 

 ward and broadly in contact with margin of cara- 

 pace, movable portion far removed from orbit, 

 d. Dactyls of walking legs armed with from two 

 to four strong, fixed spines; carapace distinctly 

 broader than long Polyonyx gibbesi (p. 113). 



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FISH AND WILDLIFE SERVICE 



