THE CANCROID CRABS OF AMERICA 429 



Chelipeds granulate above carpus with the granules arranged more 

 or less in raised reticulating rugae, and with a sharp tooth and denti- 

 culate margin within; hand with a double denticulate crest above 

 and with the minute granules of the outer surface showing a tendency 

 to arrangement in rows; these granules become obsolete on the distal 

 lower half of the major chela; upper part of inner surface granulate; 

 fingers grooved, more deeply so in the minor chela; a thin superior 

 crest on the dactyls. Ambulatory legs armed with minute spines 

 above, which form two rows on the carpus. Merus of hind leg when 

 appressed, reaching to the fifth or posterior tooth of the lateral margin 

 of the carapace. 



Measurements. — Male (20719), length of carapace 4.2, width 6, 

 fronto-orbital width 4.6, width of front 2.4 mm. 



Range. — From South Carolina to the Gulf coast of Florida; 15 to 

 101 fathoms. St. Croix, Grenada and Barbados, 69 to 170 fathoms 

 (A. Milne Edwards). 



Material examined. — See table, page 430. 



MICROPANOPE LOBIFRONS A. Milne Edwards 



Plate 178, Figures 4-6 



'Micropanope lobifrons A. Milne Edwards, Crust. Reg. Mex., 1880, p. 327, 

 pi. 53, fig. 3 and 3a (type-locality, off Montserrat, 88 fathoms; type in 

 Paris Mus.); Bull. Mus. Comp. Zool., vol. 8, 1880, p. 14 (Grenada, 170 

 fathoms; Barbados, 94 fathoms). — Rathbun, Bull. U. S. Fish Comm. for 

 1900, vol. 20, part 2, 1901, p. 32.— A. Milne Edwards and Bouvier, 

 Mem. Mus. Comp. Zool., vol. 47, 1923, p. 325, pi. 5, figs. 3 and 4. 



Diagnosis. — Carapace and chelipeds partly rough. Five lateral 

 teeth, two small, two large, one very small. A transverse ridge be- 

 hind front. No subhepatic tubercle. 



Description. — Carapace in large part smooth; fine granulation on 

 gastric, hepatic, and epibranchial lobes. Regions fairly well indicated. 

 Lobes of front arcuate, most produced at the inner two-fifths; a 

 transverse granulated ridge marks the upper border. Five antero- 

 lateral teeth; the orbital tooth little produced; second tooth equally 

 small, obtuse; third and fourth subequal, sharp-pointed; fifth minute. 

 Subhepatic tubercle obsolete or obsolescent. ■ 



Chelipeds covered with small, pointed granules; those of carpus 

 not forming reticulating rugae. Two inner carpal spines, one below 

 the other. Upper surface of palm bicristate; in the major chela the 

 granules of the outer surface become smaller distally and disappear. 

 Fingers deeply grooved. Minor palm elongate. Legs spinulous on 

 margins; hind pair when appressed, reaching fourth tooth of lateral 

 jnargin of carapace. 



Terminal half of male abdomen narrow. 



