The Aniphipoda of Bermuda. 63 



strong, 3-jointed, first joint cylindrical, twice as long as wide, with 

 a few setae on distal inner angle, second joint short, about as long 

 as broad, witli long setae on apical border, third joint conical, about 

 as long as preceding, provided apically with a single seta. 



First gnathopods of male with epimeron rather short, produced 

 anteriorly to form rounded angle ; second joint stout, third joint 

 short ; fourth joint al)out twice as long as broad; wrist cup-shaped, 

 articulating with anterior margin of fourth joint, slightly longer than 

 broad, distally expanded to width greater than that of proximal end 

 of hand, posterior margin bearing a single, stout seta distally ; hand 

 subchelate, nearly twice as long as wide, subrectangular, slightly 

 broader distally, palm transverse, slightly irregular in form ; linger 

 of usual form and as long as palm. Second gnathopods very similar 

 in form to first but slightly larger ; wrist with more prominent pos- 

 terior lobe than that of first; palm convex. 



Ejjimera moderate, with ventral margins rounded ; pereiopods of 

 normal form, furnished with clawlike fingers and with no spinning 

 glands. 



Uropods, 3 pairs, of which the first pair is the longest, with 2 

 rami of lanceolate form, armed distally with several stout spines ; 

 second pair also biramous but much shorter than first; third pair 

 very short, uniramous, with ramus much shorter than peduncle. 



Telson small, thick, entire, with few short setae at apex. 



Length about 2 mm. 



The genus was represented by a single male specimen taken from 

 the surface in the evening. May, 1898. 



Orchestia platensis Kroyer, 1845. 



1845. Kroyer, Naturhistorisk Tidsskrift ; ser. 2, vol. 1, p. 304, 



pi. 2, fig. 2. 



Eyes compound, made up of many small ocelh, moderate, circular. 



First antennae very short, extending not quite as far as tip of 

 penultimate joint of peduncle of second antennae ; segments of ped- 

 uncle subequal in length ; flagellum very short, 2/3 as long as ped- 

 uncle, made up of several joints terminating in several short setae. 

 Second antennae of moderate length ; first and second fused with 

 head ; third joint shorter than broad ; fourth joint slightly more than 

 twice as long as broad ; fifth joint considerably longer than fourth 

 and more slender ; flagellum about as long as peduncle, each segment 

 provided with several setae at distal end. 



Mandibles elongated, cutting edges divided into several teeth, 

 s])ines on spine row well developed ; molar tuljercle large ; palp 



