THE GBAPSOID CRABS OP AMEKICA. 47 



Dimensions. — Male holotype, length of carapace, 14.G; width of 

 same, 21 mm. 



Range. — West Indies. 



Material examined. — 



Jamaica: Kingston Harbor; T. H. Morgan; 1 male holotype 

 (17219). Montego Bay; from sponges and algae in brackish pond; 

 July 2, 1910; C. B. Wilson; 1 female ovig. (42935). 



Porto Rico; Fish Uawk: Porto Real; Jan. 2G, 1899; 1 male, 3 

 females (24554). Boqueron Bay; Jan. 27, 1899; 1 male, 2 females 

 (24555). 



St. Thomas; 1872; Krebs, coll.; 1 specimen (Copenhagen Mus.). 



Trinidad; Jan. 30 to Feb. 2, 1884; Albatross; 2 males (7G37). 



JMonos Island, Trinidad; Jan. 30 to Feb. 2, 1884; Albatross; 1 male 

 (19051). 



Genus PANOPLAX Stimpson. 



Panoplax STi}krpsoN, Bull. Mus. Comp. Zoul., vol. 2, 1871, p. 151 ; type, P. 

 dcprcssa Stimpson. 



Carapace arcuate anteriorly, quadrate posteriorly; depressed, 

 much broader than long, regions distinct. Fronto-orbital width about 

 two-thirds of the entire width. Frontal lobes convex, well separated 

 from the orbital angles. Antero-lateral margin dentate. Eyes of 

 moderate size. Basal antennal joint just touching the front, flngel- 

 lum standing in the orbital hiatus. Antennules transverse. liuccal 

 cavity with sides parallel. Merus of maxillipeds broader than long. 

 Chelipeds stout, unequal; wrists obliquely subquadrate; palms 

 high. 



The third to fifth segments of the abdomen of the male are fused, 

 the third does not reach the coxae of the last pair of legs, while the 

 first covers the whole width of the sternum. 



Inclines toward those xanthoid genera of which Panopeus is the 

 type. Contains but one species. 



PANOPLAX DEPRESSA Stimpson. 



Plate 12, figs. 1 and 2, 



Panoplax; depressa Stimpson, Bull. Mus. Conip. Zoul., vol. 2, 1S71, p. 1.51 

 (type-localities, East and Middle Keys, Tortugas, 5 to 7 fatbonis; tyi)e 

 not extant). 



Diagnosis. — Carapace depressed. Fronto-orbital width abotit 

 two-thirds of entire width. Abdomen of male with third to fifth 

 segments fused and not covering sternum at third segment. 



Description. — Carapace depressed, anterior third inclined down- 

 ward, regions fairly well marked, surface finely punctate, granulate 

 along the lateral teeth; two oblique epigastric lobes. Front with 

 two rounded lobes. Superior orbital margin with two notches; orbit 



