THE CANCROID CRABS OF AMERICA 243 



PARALIOMERA, new genus 



Type. — Liomera longimana A. Milne Edwards. 



Carapace broad-oval, nearly smooth; antero-lateral margin ob- 

 scurely lobed or toothed; front about a third as wide as carapace, 

 having a small outer lobe which is separated by a notch from the inner 

 upper angle of the orbit. Basal antcnnal article touching the down- 

 ward prolongation of the front. Chelipeds very unequal, smooth; 

 fingers short. Abdomen of male with third, fourth and fifth segments 

 fused. 



Contains only two species. 



KEY TO THE SPEQES OF THE GENUS PABAXIOMERA 



A*. Gastric region plainly but not deeply delimited. Transverse fringe of hair 

 on front. Major palm thrice as wide as the long slender minor palm. 

 longimana, p. 243. 



A*. Carapace almost smooth, shining, very small. Major palm twice as wide as 

 minor palm dispar, p. 244. 



PARALIOMERA LONGIMANA (A. Milne Edwards), new combination 



Plate 101, Figures 1-3 



Liomera longimana A. Milne Edwards, Nouv. Arch. Mus. Hist. Nat., Paris, vol. 

 1, 1865, p. 221, pi. 12, figs. 7-76; figs. 7 and 7a are incorrect, hands repre- 

 sented of equal size (type-locality, Guadeloupe; type in Paris Mus.); Crust. 

 R6g. Mex., 1879, p. 240, pi. 46, figs, l-lc— Rathbun, Bull. U. S. Fish 

 Comm. for 1900, vol. 20, part 2 (1901), p. 25. 



Cancer nigerrimus Desbonne, in Desbonne and Schramm, Crust. Guadeloupe, 

 1867, p. 25 (type-locality, Guadeloupe; type perhaps not extant). 



Diagnosis. — Gastric region plainly delimited; transverse fringe of 

 hair on front; antero-lateral margins with four shallow lobes. Cheli- 

 peds strikingly unequal, minor hand about a third as wide as major. 



Description. — Carapace about three-fifths as long as broad, thick, 

 very convex, regions very faintly marked; antero-lateral margin 

 showing four shallow lobes or teeth, the last two most distinct and 

 angular. Front a little less than a third the breadth of carapace, dis- 

 tinctly bilobed, and with a separate tooth at outer end below orbital 

 angle; a transverse fringe of hair behind the lobes. Antennal fla- 

 gellum longer than greatest diameter of orbit. Chelipeds extremely 

 unequal in both sexes, smooth, conspicuously punctate; arm project- 

 ing beyond carapace; larger cheliped heavy, hands with subparallel 

 margins; the smaller hand very slender, about one-third the width of 

 larger. Fingers moderately gaping. Larger wrist nearly as broad as 

 long, inner angle blunt; smaller wrist much longer than broad, with- 

 out an inner angle. Legs compressed, almost smooth, hairy. 



Color. — Solid black on anterior and lateral portions of dorsal sur- 

 face of carapace; toward the center, clove black with slightly greenish 

 dots; but on a large, roughly oblong, posterior area, slate black, ^\ath 

 slate black dots with mouse gray suffusions around them. Under 

 parts slate gray; pterygostomian region, maxillipeds, and epistome 



