NO. 3 GARTH : SOME NEW SPECIES OF BRACHYURAN CRABS 77 



deeply sunken beneath front. Tips of male copulatory appendages visible 

 at sides of abdomen. 



Description: Carapace superficially smooth and bare, microscopically 

 flat granulate, uneven, narrow, breadth exceeding length by one sixth, 

 very convex longitudinally as well as transversely, regions incompletely 

 indicated. Front advanced, quadridentate, teeth subequal, tuberculiform, 

 granulate, hairy, well separated; median V deep, prolonged posteriorly 

 into a gutter, lateral separations U-shaped and of one half the depth. 

 Orbits directed forward, inner orbital tooth triangular, almost as ad- 

 vanced as the front, as thick at base as half the front, and separated from 

 it by a deep U-sinus also prolonged into a groove; three orbital fissures, 

 two dorsal and one ventral, separating three equal and inconspicuous 

 teeth, the median, exorbital, and outer suborbital ; inner suborbital tooth 

 prominent, visible in dorsal view at side of inner orbital, and separated 

 from it by a wide hiatus. Eye deeply retractile, base standing in orbital 

 hiatus, a row of granules bordering cornea. Anterolateral teeth four, ex- 

 clusive of the minute exorbital, the first bluntly triangular, separated 

 from the exorbital by a broad, swollen margin equal in width to the next 

 two teeth, second and third teeth tuberculiform, crowded toward first, 

 fourth tooth again separated from third by a sinus as broad as the dis- 

 tance between the first tooth and the exorbital ; carapace widest at level 

 of fourth tooth; a subhepatic tubercle barely concealed in dorsal view. 

 Furrows of carapace incompletely defining the somewhat protuberant 

 protogastric, hepatic, and epibranchial regions. 



Epistome wide, deeply sunken beneath front. Antennules folding 

 obliquely between inner and outer pair of frontal teeth. Antenna with 

 basal article falling far short of rostrum, flagellum occupying normally 

 the U-shaped sinus between front and orbit, rather than the orbital 

 hiatus. (See pi. 20, fig. 2.) Merus of external maxilliped pentagonal, 

 apex directed forward, length a shade greater than breadth, granulate 

 and hairy. Ischium with a furrow parallel to the margin at inner two 

 fifths superficially as definite as the separation between endognath and 

 exognath. (See pi. 20, fig. 6.) Sternum of male with two raised, granu- 

 late areas opposite coxae of chelipeds. 



Male abdomen with seven free segments, terminal joint broader than 

 long, its sides converging, sinuous, tip pointed. Abdomen when in place 

 not concealing hairy tips of male copulatory appendages, which are 

 lodged in grooves between segments of the sternal plastron. ( See pi. 20, 

 fig. 7.) 



