no. 2067. NEW SPECIES OF GRABS— RATHBUN. 147 



third segment acute; third to seventh segments subtriangular with 

 concave sides; terminal segment suboblong with tip rounded. 



This species and the following one are so much wider than C. ciliata 

 Stimpson * and C. hispida Alcock 2 that they are in no danger of being 

 confused. 



CERATOPLAX TRUNCATIFRONS, new species. 



Type-locality. — Off western Samar: Badian Island (N.), N. 27° E., 

 5.75 miles; lat. 11° 31' 40" N.; long. 124° 42' 40" E.; 32 fathoms; 

 gn. m.; April 14, 1908; station 5206, Albatross; one male. 



Type— Cat. No. 46399, U.S.N.M. 



Dimensions. — Type male, length of carapace, 4.4 mm.; width of 

 same, 7.4 mm.; fronto-orbital distance, 3.7 mm.; front, 1.8 mm. 



This species is so closely allied to the preceding, 0. fulgida, that it 

 can best be described by comparison. The greatest width of the cara- 

 pace is further back, the antero-lateral margins being longer and the 

 postero-lateral shorter; the latter converge very little, almost imper- 

 ceptibly. The front is truncate; the eyes viewed from before are 

 higher; the ischiognath is wider; fingers longer; those of the smaller 

 chela more deflexed and with smaller teeth, the immovable finger of 

 the larger chela with less prominent teeth; base of abdomen narrower, 

 first segment longer, being plainly visible, third segment much less 

 extended laterally, its angles nearly right angles, terminal segment 

 shorter, its length and breadth equal. 



TYPHLOCARCINUS CRATERIFER, new species. 



Type-locality. — East of Masbate Island: Destacado Island (S.), 

 N. 87° E., 8.5 miles; lat. 12° 15' N.; long. 123° 57' 30" E.; 80 

 fathoms; s., m., sh.; April 20, 1908; station 5213, Albatross; one 

 female. 



Type.— Cut. No. 46397, U.S.N.M. 



Dimensions. — Type female, length of carapace, 9.9 mm.; width of 

 same, 13.5 mm.; fronto-orbital distance, 5.7 mm.; width of front, 

 2.8 mm. 



Surface covered with pubescence; margins fringed. The anterior 

 part of the carapace is strongly bent down, the postero-lateral margins 

 are subparallel and form a small, obtuse tooth at their union with the 

 antero-lateral margins; posterior margin arcuate. The grooves sep- 

 arating the branchial from the gastric and cardiac regions are deep; 

 mesogastric region well-defined; from it a median furrow leads to the 

 edge of the front; when the pubescence is removed, the carapace 

 appears coarsely punctate; near the lateral margins it is finely granu- 

 late; near the end of the cervical suture and almost in line with the 

 orbital tooth there is a small but conspicuous crater-like pit; behind 



1 Alcock, Journ. Asiatic Soc. Bengal, vol. 69, 1900, p. 320, and synonymy. 



2 Journ. Asiatic Soc. Bengal, vol. 69, 1900, p. 321. 



