CALIFORNIA STALK-EYED CRUSTACEA. 225 



the following appendages, propodal joint entire and spinous, terminal joint 

 unguiform; the remaining legs slender, the terminal portion multiarticu- 

 late and devoid of a claw. Pleopods in both sexes small, simple, and sim- 

 ilar. Telson deeply cleft at the apex. 



Type. — H. formosa Smith. 



Heteromysis odontops Walker. 



Heteromysis odontops Walker, Trans. Liverpool Biol. Soc, Vol. XII, 1898, 

 p. 278, PI. XV, figs. 3-6; Ann. Mag. Nat. Hist. (7), Vol. II, 1898, p. 

 276. 



Body rather slender; rostrum subacute. Eyes stout, with a tooth on 

 the distal end of the anterior margin of the peduncle. Legs behind the 

 second pair with a terminal segment divided into eight articulations. 

 Telson with the lateral margins slightly concave and armed with about 

 twenty-four spines which extend over the whole length; tip of the telson 

 with a deep, narrowly triangular cleft whose sides are armed with about 

 thirty rather long spines. Inner uropod "considerably shorter than the 

 outer, with four spines at the proximal end of the inner margin." The 

 inner margin of the antennal acicle is figured as devoid of setse — a charac- 

 ter in which this species differs from the next. 



Puget Sound. 



Heteromysis spinosus, sp. no v. 



Body quite robust and somewhat depressed. Kostrum triangular, acute. 

 First and third joints of the antennular peduncle of subequal length; 

 second joint very short, the inner side longer than the outer; sensory 

 organ represented by a minute papilla; inner flagellum short, not one-half 

 the length of the outer one. Antennal scale small, oblong-oval, ciliated 

 on both sides and at the rounded extremity; peduncle reaching about to 

 the tip of the acicle, the last joint about three-fourths the length of the 

 preceding one; flagellum about equal to the outer flagellum of the anten- 

 nules. Trunk of the mandibles short and strongly curved; first joint of 

 the palp very short, second long, curved; the third joint much narrower 

 and much shorter than the preceding one. Third maxillipeds large and 

 stout, the penultimate joint with three pairs of spines on the inner mar- 

 gin; claw strong and curved. The succeeding thoracic appendages are 

 slender; the terminal portions divided into 8-10 articulations and ending 

 in a slender claw. The pleopods are uniramous, rudimentary, and of 

 similar form. Telson triangular, with a deep, triangular, terminal notch, 

 15 



