104 CALIFORNIA ACADEMY OF SCIENCES. 



Blepharipoda occidentalis Randall, 



Blepharipoda occidentalis Randall, Journ. Acad. Nat. Sci. Phila., Vol. 



VIII, 1839, p. 131, PI. VI. GiBBES, Proc. Am. Ass. Adv. Sci., 1850, 

 p. 187. Dana, Crust. U. S. Expl. Expd., Part I, 1852, p. 406. Stimp- 

 SON, Journ. Bost. Soc. Nat. Hist., Vol. VI, 1857, p. 486; Proc. Acad. 

 Nat. Sci. Phila., 1858, p. 230. Miers, Jouru. Linn. Soc. London, 

 Vol. XIV, 1879, p. 334. Ortmann, Zool. Jahrb. Abth. f. Syst., Bd. 



IX, 1896, p. 222. 



Carapace oblong, scabrous in front, but smooth and punctate behind. 

 The middle of the carapace is elevated, forming a longitudinal ridge which 

 ends anteriorly in a spine immediately behind the transverse postfrontal 

 impression. A transverse impression behind the median region and an 

 oblique one on either side terminating at the last lateral spine. Front 

 with a median spine separated by a rounded sinus from the more promi- 

 nent triangular spine-tipped, lateral teeth. Antero-lateral margin with 

 three large spines and a smaller fourth spine some distance further back. 

 The last joint of the eye-peduncles is but little longer than the preceding 

 one. Anteunules with the upper flagellum long (over one-half the length 

 of the carapace) and strongly ciliated; lower flagellum scarcely as long as 

 the peduncle. Peduncle of the antennae long (nearly one-half the length 

 of the carapace), the last two joints cylindrical and ciliated on the outer 

 surface; flagellum curled, strongly ciliated on one side, and somewhat 

 shorter than the peduncle. Ischium of the maxillipeds dentate on the 

 inner margin and- produced at the antero-internal angle; exognath reach- 

 ing considerably beyond the middle of the merus. Chelipeds strong; 

 merus short, stout, with one or more spines on the lower side; carpus 

 scabrous externally, with the supero-distal angle produced into a large, 

 compressed, triangular, spine-tipped tooth; at the base of this tooth the 

 upper margin is armed with a variable number of spines; and there may 

 be several small spines on the anterior edge; hand flattened, the outer 

 surface scabrous and furnished with two spines, one near the base, the 

 other behind the gap between the fingers; a spine near the middle of the 

 lower margin, in front of which there may be several smaller ones; poUex 

 broad, triangular, much compressed, with the inner margin armed with a 

 variable number of spines; dactyl rather slender, curved, and spiny on 

 the outer edge. The ambulatory legs have the anterior margins of the 

 carpi spinulous and the antero-distal angles produced; dactyls subfalci- 

 form, but varying greatly in shape in the different pairs. The slender last 

 pair of legs ends in a small, well developed chela. The lateral expansions 

 of the fifth abdominal segment are subacute. The inner ramus of the 

 uropods is narrower than the outer and articulated near the middle of the 

 side of the peduncle, the outer one joined to the tip. Telson short, 



