48 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



as wide as each frontal lobe. Lateral teeth five, including orbital; 

 the second shallow, separated from the first by a shallow sinus; the 

 third large, blunt, outer margin very arcuate; fourth triangular, 

 with a spiniform tip; carapace widest at this point; fifth tooth very 

 small, not projecting beyond the general outline. Postero-lateral 

 margins moderately converging behind. 



Merus and carpus of chelipeds granulate toward the margins; 

 merus dentate on upper margin; carpus oblong, with a stout blunt 

 tooth at the inner angle and a few tubercles below it; an anterior 

 transverse groove. Hands smooth and rounded, punctate; fingers 

 dark brown, color not extending to palm; prehensile teeth broad, 

 low, a large one at base of dactylus; no gape. In the female the 



FIG. 21. PANOPLAX DEPJIESSA, MALE (25G24). a, ODTER MAX- 



ILLU'ED, XU; b, ABDOMEN AND I'AUT OF STERNUM, X 0. 



upper surface of the manus is flattened, with traces of two longi- 

 tudinal carinae and an intermediate furrow. Merus joints of legs 

 roughened on anterior margins, following joints hairy. 



Measurements. Male (25G24), length of carapace 8.G, width of 

 same 13.5 mm. 



Range. West coast of Florida to Yucatan Channel and Porto 

 "Rico. To a depth of 28 fathoms. 



Material examined. See page 49. 



Genus GLYPTOPLAX Smith. 



Glyptoplax Surra, Trans. Connecticut Acad. Arts and Scl., vol. 2, 1870, 

 p. 104; type, G. putjnax Smith. 



Carapace narrow, hexagonal, xanthoid in form, deeply areolated. 

 Front prominent, well separated from the orbital angle. Lateral 

 margin 4- to 5-dentate. Orbits and antennae much as in Panoplax. 

 Buccal cavity widening anteriorly. 



