405 



Antennae I and II in males are approximately equal in length, 

 flagelli-form, and only slightly shorter than the body. In antennae I the 

 1st segment of the peduncle is thick and cylindrical while the next two 

 segments are very short; the 1st segment of the flagellum is conical; the 

 2nd segment is strong, with a spoon-shaped process in the lower part 

 of the distal margin; the flagellum has 17 segments. The flagellum of 

 antennae II likewise has 17 segments. Antennae I in females are barely 

 longer than the head; the lower distal angle of the only segment of the 

 peduncle is stretched into a long wedge-shaped process that is longer 

 than the segment; the flagellum is elongated-conical and much longer 

 than the peduncle. Antennae II are slightly longer than the peduncle of 

 antennae I and the flagellum one-segmented, conical, and approximately 

 the same length as the peduncle. 



The epistome is conical and distinctly larger than in other genera 

 of the family. The mandibles have a narrow body, sharply denticulate 

 cutting edge, an accessory plate (left mandible), a broad dentate pro- 

 cess similar to that in representatives of the genus Parathemisto, and 

 (in males) a fairly strong three-segmented palp. In maxillae I the palp 

 broadens distally and has a round apex; the outer lobe is conical, armed 

 with strong spines, and its surface covered with thm short setae. The 

 outer lobe of maxillae II is longer and narrower than the Inner. The 

 basal segment of the maxillipeds is narrow and long, longer than the 

 narrowly lanceolate outer lobes, and the fused inner lobes more than 

 half the length of the outer lobes. 



The 6th segment of pereopods I is narrowly conical and 1.5 times 

 longer than the 5th; the claw is strong, slightly curved, and bears numer- 

 ous thin setae on the surface; the 5th and 6th segments together are 

 longer than the 2nd segment. Pereopods II are longer and stronger than 

 pereopods I and devoid of any ornamentation; the 5th segment is cupo- 

 late and its round upper lobe and acute lower lobe cover the proximal 

 part of the broad and strong 6th segment; the 6th and 7th segments 

 form a well-developed strong chela. Pereopods III and IV are similar in 

 structure and notably longer than pereopods 11; the linear 2nd segment is 

 somewhat shorter than the 5th and 6th segments together; the 4th and 5th 

 segments are armec with strong setae on the posterior margin; the 6th 

 segment is slightly curved, thin, and the posterior distal angle stretched 

 into an acute denticle which together with the long thin claw forms a 

 poorly developed chela. Pereopods V-VII are almost identical in length, 

 notably longer than pereopods III-IV, and devoid of any ornamentation; 

 the 6th segment is somewhat broadened in the distal part, its posterior 

 distal angle stretched into a denticle, which together with the highly 

 curved claw forms a small chela. 



