THE CANCROID CRABS OF AMERICA 40 1 



Description. — Carapace well areolated, mesogastric region con- 

 stricted behind the point where it narrows to the tip. Transverse 

 granulated ridges on epigastric, protogastric, hepatic, and epibran- 

 chial regions; except in the last-mentioned, the ridges are two or 

 more granules in width, and in the protogastric and hepatic ridges 

 are very irregular and wider at outer than inner end. Anterior and 

 lateral margins granulate; third, fourth, and fifth teeth surmounted 

 by a Hne of granules, that on fourth and fifth teeth widening inwardly 

 in a bunch of granules. Front with a row of granules paralleling 

 the margin; a narrow median V; edge of either half obHque and 

 sinuous, forming a low outer lobule strongly rounded off. Inner 

 upper tooth of orbit acutangled; superior fissures V-shaped, inter- 

 mediate space short; outer emargination a broad V from which the 

 lower margin of the orbit is transverse up to the conical inner tooth. 

 Outer tooth of orbit small, obtusangled, separated by a shallow 

 rounded, or sometimes slightly pointed sinus from the next or second 

 antero-lateral tooth; this is larger than the first, larger in full-sized 

 than in small specimens, and sometimes lounded or lobiform as in 

 the type-lot, or subtriangular as in smaller specimens. Last three 

 teeth unequal and dissimilar; "bird widest, suboblong, anterior 

 margin straight, oblique, posterior margin rounded or a little angled. 

 Fourth tooth prominent laterally (carapace widest here), not much 

 more than half as mde at base as third, anterior margin concave 

 and obHquely transverse, posterior margin convex; fifth tooth trian- 

 gular, directed outward. 



Chehpeds very unequal in male. Upper margin of merus rough 

 with granules, two or three denticles preceding the subdistal tooth 

 or tubercle. Carpus rough with granulated ridges and tubercles, 

 the distal furrow widens at outer end, and a broad, nearly smooth, 

 depression runs along the inner border from the tooth to articulation 

 with manus. The latter is rough above and inside with fine granulate 

 reticulations, superior groove well marked; on the outer surface the 

 granules become very fine below or disappear. Fingers not gaping, 

 white, color not extended on palm. Fingers of major chela very 

 short and broad, propodal finger horizontal; fingers of minor chela 

 long, narrow, deflexed, grooves deeper than in major chela. 



Fifth segment of male abdomen narrowing distally, sides sinuous. 

 Sixth segment broader than long, narrowing slightly toward fifth 

 segment. Terminal segment an equilateral triangle, or in the full 

 grown, more elongate; tip subacute. 



Measurements.— M?i\e holotype, length of carapace 6.9, width of 

 same 9.8, fronto-orbital width 6.3, width of front 3.4 mm. 



Eange. — Western and southern Florida; West Indies. 



Material examined. — 

 79856—30 27 



