152 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



oblong with the sides moderately convergent; all the segments are 

 distinct. 



This species differs from T. canaliculata Rathbun 1 and T. piro- 

 culata Rathbun 2 in its narrower fronto-orbital region, less than hah 

 as wide as the carapace, instead of more than half, as in those species; 

 in the dactyli diminishing in length from the first to the fourth pair; 

 in the indented lateral margins of the carapace. 



TYPHLOCARCmOPS MARGINATA, new species. 



Type-locality. — Off eastern Palawan: 30th of June Island, N. 29° 

 E., 12.2 miles; lat. 9° 12' NY; long. 118° 28' E.; 27 fathoms; fne. 

 gy. s.; April 3, 1909; station 5426, Albatross; one male. 



Type.— Cat. No. 46395, U.S.N .M. 



Dimensions. — Type male, length of carapace, 6.7 mm.; width of 

 same, 8.7 mm.; width across front and orbits, 4.5 mm.; width of 

 front, 2.3 mm.; length of third leg, about 14.2 mm. (The tip of the 

 dactyl is broken off.) 



Surface pubescent, margins scantily fringed with hair. Carapace 

 nearly level from side to side, bent down anteriorly so as to conceal 

 the edge of the front in dorsal view; H -depression deep, nasogastric 

 region wholly delineated, protogastric partially so; posterior half of 

 carapace granulate, granules elsewhere obscure and scattered; pos- 

 tero-lateral margins straight and posteriorly convergent; antero- 

 lateral margins long, denticulate, three interruptions in the denticles 

 forming three teeth; the anterior tooth is truncate, on the other 

 teeth the anterior denticle is acute making a dentiform tooth; in the 

 smaller specimen the teeth are considerably narrower and are tuber- 

 culiform and subtruncate. Edge of front bilobed, lobes nearly trans- 

 verse. Orbits pyriform, eyes somewhat protuberant, cornese dark, 

 ventral- terminal. 



Epistome well developed and with a sharp edge; buccal cavity 

 quadrate (as to sides and front, in ventral view) with corners rounded, 

 completely filled by the broad maxillipeds ; the outer edge of the 

 merognath slants outward to the anterior angle. 



Chelipeds not very unequal; merus and carpus granulate toward 

 the margins; palm unevenly granulate, most so near the lower mar- 

 gin; fingers grooved, prehensile edges furnished with triangular teeth; 

 a very small gape at base when fingers of larger chela are closed. 



Legs slender; dactyli of first three pairs subequal, of last pair much 

 shorter and strongly upcurved. 



Abdomen with first segment linear; second, half as long as the 

 third, both laterally acute, the third widest at its proximal end; 



i Proe. Biol. Soc. Washington, vol. 22, 1909, p. 112. 



* Trans. Linn. Soc. London, ser. 2, Zool., vol. 14, 1911, p. 239. 



