498 



BULLETIN OF THE BUREAU OF FISHERIES. 



Dexamine thea Boeck. 



Head produced into a small rostral projection; eyes nearly round, margin of the head in front of 

 each produced into an acute angular process; first antenna' over half length of body; first joint of 

 peduncle rather stout, nearly two-thirds length of slender second joint, which is about three times the 

 length of third; fiagellum slender, with lii-16 elongated segments; second antennae (at least in 

 female) much shorter than first; last two joints of slender peduncle of subequal length; fiagellum not 

 much (if any) exceeding peduncle, ami composed of 5-9 elongated joints; mandibles much as in 

 D. spinosa; under lip with very small inner lobes; first maxilla; with inner plate very small, 

 subovate, and terminated with a single seta; outer plate with about eleven dentate and furcate 

 terminal spines; palp unarticulate, distally widened and furnished with several terminal seta', the 

 inner margin devoid of seta? or possessing a single one; second maxilhc as in IK spinosa; maxillipeds 

 with inner plate short and rather broad, the transverse distal margin furnished with about six large 

 setaj; outer plate very large, overlapping the palps, inner margin minutely denticulated toward distal 

 end, the distal half (or less) of inner side furnished with about six stout spines which increase in 

 length and become set farther from the edge toward the tip; palp scarcely exceeding tip of outer 

 plate; dactylus absent; first four coxal plates well developed, much deeper than broad, but not much 

 deeper than their segments; lower margins setose; first gnathopods rather stouter but shorter than 

 second; carpus short, subtriangular; hand rather broaderthan carpus; palm oblique, finely pectinated, 

 rounded distal end armed with two stout spines; second gnathopods with carpus narrowly triangular, 



Dexamine ttea. Woods llulo, Masa. 



furnished with a tuft of large seta? at lower posterior angle and another near middle of posterior 

 margin; hand regularly widening toward distal end; palm oblique, finely pectinated rounded posterior 

 angle armed with two stout spines; hand and carpus taken together forming a narrow, elongated 

 triangle; perseopods very spiny, dactyls narrow, over half the length of propodi; basal joint of 

 penultimate pair much expanded; posterior margin serrated and strongly bulging backward; 

 basal joint of last pair not expanded, linear; first four segments of abdomen each larger than any of 

 the thoracic segments, and armed dorsally with a strong posterior spine; postero-lateral angle of third 

 segment produced and acute; second uropods much shorter than first or third, rami like those of 

 first, with an elongated terminal spine and several lateral spines; terminal uropods extending a little 

 beyond first, the rami flattened, subequal, lanceolate, devoid of a terminal spine, and nearly twice the 

 length of peduncle; telson much elongated, extending nearly to tip of posterior uropods. cleft nearly 

 to base, lobes denticulated at tip and furnished with about three tufts of spines near lateral margins 

 and one or more spines at distal end. 



Length of specimens examined, scarcely 3 mm. Adult specimens examined by Sars measured 

 4 mm. 



Norway (Sars); British Isles; France; Woods Hole, Mass. 



