THE BEACH YUKA AND MACRURA OF PORTO RICO. 
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Anasimus fugax A. Milne Edwards. 
Avasimus fur/ax A. Milne Edwards, Crust. R5g. Mex., 350, pi. xxxi A, f. 1, 1880. 
Carapace longer than broad and bearing on median line three erect spines; the first on gastric 
region; the second, of same size, on anterior cardiac lobe; the third, smaller, surmounts posterior 
cardiac lobe. (This one is obsolete in our specimen, which is smaller than the type. ) The first article 
of the abdomen carries a fourth spine. Protogastric. lobes and branchial regions armed with a spine. 
Surface of carapace irregularly granulate; rostrum about one-fourth the entire length of carapace, 
spinulous above. Upper orbital border armed with a spine. Basal article of antenna with a terminal 
spine; a spine online of anterior margin of eyes; a few smaller spines and spin ules on margins; flagellum 
long. Interantennulary septum prolonged downward in a strong triangular tooth. The anterior feet 
of the male are clothed with stiff and distant hairs and bear a number of spines, chiefly on the margins; 
fingers of chelae in contact except at very base. Ambulatory legs cylindrical, smooth, and hairy, the 
first two pairs of same length, the third and fourth a little shorter. Sternal plastron and abdomen 
granulate. Abdomen of female very wide. 
Dimensions of male: Length of carapace, 13 mm.; width, 9 mm.; total width with the feet 
extended, 75 mm. (A. Milne Edwards.) Length of Porto Rican male, 7.6 mm.; width, 5.1 mm. 
Santa Cruz, 115 fathoms; Barbados, 56 and 82 fathoms. Mayaguez Harbor, 97 to 120 fathoms, 
station 6067, 1 male. 
Genus INACHOIDES Milne Edwards & Lucas. 
Inachoides Milne Edwards & Lucas, d’Orbigny’s Voy. dans l’Amer. Merid., vi, part 1, 4, 1843. 
Carapace longer than broad; cardiac, branchial, and gastric regions swollen. No preorbital spine. 
Postorbital tooth present, though sometimes very small. Rostrum short and simple, with triangular 
base, terminating in a spine. Basal antennal joint with an antero-external tooth; flagellum exposed 
from its insertion. Merus of outer maxillipeds cut at the antero-internal angle for insertion of palpus; 
antero-external angle rounded. Abdomen of male with six segments, of female with live. Chelipeds 
enlarged; palms swollen. Ambulatory legs slender, of medium length, the first pair the longest; 
subprehensile, the propodal joints more or less enlarged distally; dactyli curved, folding against the 
propod i. 
Inachoides intermedius Rathbun. 
I nachoides intermedins Rathbun, Proc. U. S. Nat. Mus., xvn, 57, 1894. 
Carapace smooth above, or nearly so, punctate; regions well marked. Rostrum sulcate, tipped 
with a short spine. Postorbital tooth minute. A tubercle on margin of hepatic region, on pterygos- 
tomian, and on subbranchial. Basal antennal joint with a blunt tooth at antero-external angle. 
Sternum of male with a large tubercle on either side between bases of chelipeds. Abdomen of female 
smooth, punctate, with a median earina. Chelipeds of the male twice as long as carapace, of female a 
little longer than carapace; a few tubercles on manus, which is subcylindrical; fingers in male two- 
thirds as long as palm, in female equal to palm; gaping; each with a large basal tooth. Ambulatory 
legs hairy; carpal and propodal joints considerably enlarged distally; dactyli falciform. 
Dimensions of male: Length, 7.3 mni. ; width, 5.1 mm. 
Off Rio de Janeiro, Brazil, dredged (type locality). Porto Rico: Mayaguez; Boqueron Bay. 
Genus EPIALTUS Milne Edwards. 
Epiallus Milne Edwards, Hist. Nat. Crust., i, 344, 1834. 
Carapace broad, pentagonal or hexagonal, almost smooth, with two or more lateral projections, 
sometimes very largely developed. Rostrum broad, triangular or oblong, bifid or entire. Eyes small. 
Preorbital tooth either present or absent; postorbital small, minute, or wanting. Abdomen of male 
with six or seven segments; of female with five or seven segments. Basal joint of antenna triangular; 
movable part concealed beneath rostrum. Merus of outer maxillipeds broad, subquadrate, notched at 
antero-internal angle where the palpus is articulated. Chelipeds strong; fingers with tips excavate 
or spoon-shaped; in the male either gaping or in contact. Ambulatory legs stout, subcylindrical, 
diminishing successively in length from first to fourth; propodi sometimes with an inferior tooth or 
bunch of setae; dactyli with two rows of spinules beneath. 
