349 



3. Hyperoche cryptodactylus Stebbing, 1888 (Fig. 144) 



Stebbing, 1888: 1399. 



Length of the only known specimen (male) about 10 mm. 



The head is short, approximately equal to the first two somites of 

 the pereon, and its anterior side flat or slighdy concave. The structure of 

 the antennae is the same as in other species of the genus; in males the 

 1st segment of the flagellum of antennae I is broadly conical, equal in 

 length to the penduncle, and its lower margin bears long tender setae. 

 Antennae II lack ornamentation. 



In the mandibles the palp is strong, exceeds the mandibular body in 

 length, and the cutting edge is short and denticulate The outer lobe:, of 

 the maxillipeds are oval, with an acute apex and a convex outer margin, 

 the inner lobes are very small. 



The 2nd segment of pereopods I has a convex a-Uerior m.^rgin and 

 its width is 2/3 its length; the lower distal angle of the 4th segment is 

 stretched into a round lobe bearing strong marginal setae; the lobe of the 

 5th segment is acute, denticulate along the convex anterior margin, and 

 almost reaches the distal end of the narrowly oval 6th segment; the claw 

 is strong and denticulate along the posterior margin. The lobe of the 4th 

 segment of pereopods II is far less developed; the lobe of the 5th segment 

 has an almost straight, finely denticulate anterior margin, and its length 

 somewhat exceeds that of the conical 6th segment; the distal end of the 

 6th segment is round; the claw is thin, almost straight, and with smooth 



286 



Fig. 144. Hyperoche cryptodactylus Stebbing, male (after Stebbing, W 



