266 CALMAN. 



M. californiana^ Ibid. 



Orchestoidca scalndpes Spence Bate, Cat. Amph, Brit. Mus. II, 



PL I, f. 3. 1862. 

 0. calif orniajia, Ibid., p. 14. 



Description of Male. — Body robust, glabrous, lower edges of 

 coxal and epimeral plates and all the appendages scabrid with 

 short stiff setae. Fifth pair of coxal plates having the anterior 

 lobe larger than the posterior, angled below, while the posterior 

 lobe is evenly rounded. Eyes slightly reniform, black. Su- 

 perior antennae not reaching the middle of the penultimate joint 

 of the inferior, the three joints of the peduncle subequal, flagel- 

 lum 9-jointed, hardly longer than half the peduncle. Inferior 

 antennae longer than the body and very stout. Last joint of 

 the peduncle twice as long as the preceding, increasing in thick- 

 ness to within a short distance of its distal end, the greatest 

 thickness being nearly one-fifth of the length of the joint. 

 Flagellum more than one and a-half times as long as the pe- 

 duncle. Palp of maxillipeds three-jointed, second joint ex- 

 panded inwards as a flat plate, last joint ovate. Inner plate 

 with three conical teeth on distal margin. Anterior gnatho- 

 pods not subchelate, carpus broader and much longer than 

 the propodus, and having a large tubercle projecting from 

 its lower or posterior edge near the distal end. Propodus 

 cylindrical, having a slight swelling on its lower or posterior 

 face distally. Posterior gnathopods very large, carpus small, 

 propodus ovate, palmar edge oblique and not sharply defined 

 from the posterior edge of hand, bearing a low rounded setose 

 eminence near the articulation of the dactyl, and on the prox- 

 imal side of this armed with about six short spines with inter- 

 vening setae. Dactyl strong, somewhat sharply curved near 

 the base. Claw of second pereiopod bearing at about the 

 middle of its concave side a blunt tooth, from within which 

 springs a small seta. On the posterior legs the tooth is obso- 

 lete, but the seta remains. First pair of uropods having the 

 rami subequal, not much shorter than the peduncle, both bear- 

 ing spines on their outer and inner edges. Last pair of uro- 

 pods having the single ramus lanceolate and longer than the 

 peduncle. Telson small, triangular, rounded at the tip. 



