34 THE BRACHYUEA. 



Sesarma (Parasesarma) plicatum (Latreille). 



Cancer quadratus Fabricius, Suppl. Eutora. Syst., 1798, 341. (Not Cancer quadrata 

 Meuschen, Mas. Gronov., 177S, 84, which is an indeterminable species of Sesarma 

 (?) from America, nor Cancer quadratus Fabricius, Mant. Ins., 1787, 1, 315, which 

 is an Ocypode.) 



Ocypode plicata Latreille, Hist. Nat. Crust., 1803, 6, 47. 



Sesarma quadratum Alcock, 1900, 69, 413. 



Kusaie, Carolines; Feb. 9, 1900; 4 <?, 4 ?, 5 juv. 



Small specimens, the largest, an adult ?, measuring only 14.5 mm. in 

 width. Legs marked with irregular transverse stripes of color. 



Sesarma (Parasesarma) carolinensis, sp. nov. 

 PI. 5, Figs. 2,2a; PI. 9, Fig. J. 



Carapace considerably broader than long, and broader anteriorly than pos- 

 teriorly. Surface almost smooth to the naked eye, but under the lens 

 crossed, except in the middle portion, by fine transverse rugae, which are 

 for the_most part short, but the branchial region has 5 or G long lines, and 

 the posterior part has some longish lines ; surface sparingly punctate. Re- 

 gions faintly indicated, except the anterior portion of the mesogastric. No 

 lateral teeth. 



Front I of the fron to-orbital width, vertical; 4 superior lobes subequal 

 and well separated ; sides of front parallel ; lower margin in front view for 

 the most part straight, but toward the ends rounding up to the lateral 

 margins ; in dorsal view, slightly bilobed. Superior margin of orbit sloping 

 almost directly backward to the orbital tooth. 



Merus joint of chelipeds with a large laminate anterior expansion, the 

 edge of which is denticulate ; the denticles are larger, more irregular, and 

 more projecting on the distal border of the lamina. Upper surface of arm 

 and wrist rugose. Inner angle of wrist blunt. Outer surface of hand 

 for the most part smooth and covered with large punctae ; upper part finely 

 granulate, the granules proximally forming rugae ; 2 oblique pectinated 

 ridges not parallel to the border of the hand. The upper surface of the dac- 

 tyls is marked by 14 or 15 transverse ridges, each of which is longer than 

 the intervals between them, and is divided lengthwise by a groove. Each 

 intervening space is occupied by an elevation, sub-triangular in shape, the 

 base of each triangle being at the proximal end of the space. The fingers 

 of the S have a very slight gape ; the teeth of the dactylus are smaller than 



