351 



the flagellum consists of 18-20 segments. The flagellum of antennae II 

 consists of 12-15 segments. 



The 2nd segment of pereopods I is almost linear; the lobe of the 

 5th segment is narrow, has a concave and denticulate anterior margin, 

 and is distinctly shorter than the 6th segment; the claw is almost straight 

 and more than half the 6th segment in length. Pereopods II are somewhat 

 longer than pereopods I; the 2nd segment has a straight posterior margin; 

 the 5th segment is distinctly shorter than in pereopods I, with a narrow 

 distal lobe, and almost straight denticulate anterior margin, and extends to 

 the distal end of the 6th segment; the claw is free, straight, and dentculate 

 along the posterior margin. Pereopods III and IV are equal in length; the 

 5th segment is barely longer than the 4th and its posterior distal angle 

 strethed and acute; the 6th segment is longer and narrower than the 5th 

 segment and its posterior margin armed with long setae; the claw is 

 almost straight and 1/3 the length of the 6th segment. Pereopods V-VII 

 are equal in length and slightly longer than pereopods III and FV; their 

 slightly curved claw is half the length of the 6th segment. 



The posterior lower angles of epimerons I-III are not acute. The 

 uropods are relatively shorter and broader than those in H. medusarum. 

 Uropods I do not reach the apex of pair III. The basipodite of uropods III 

 is distinctly broader than in uropods I and II, its length less than twice its 

 width; the lanceolate outer rami are broader than the inner. The roundish- 

 triangular telson falls short of the base of the basipodite of uropods III. 



Distribution: Coastal regions of Brazil. 



Absent in our collections. 



5. Hyperoche picta Bovallius, 1889 (Fig. 146) 



Bovallius, 1889: 111; Senna, 1906: 168. 



Length of males 4 mm. 



The body is elongated but in males the pereon is broader and more 

 massive than in other species of the genus. Somite lof the pereon is 

 almost half the length of somite II. The head is large, massive and almost 

 equal in length to the first three somites of the pereon. The eyes occupy 

 the entire dorsolateral surface of the head and are intense red. 



Antennae I are approximately the same length as the entire body; 

 the 1st segment of the peduncle is long and strong, its length three 

 times that of the succeeding segments together; the 1st segment of the 

 flagellum is very large and broad and about three times longer than the 

 entire peduncle. Antennae II are somewhat shorter than antennae I; the 

 segments of the peduncle are large and cylindrical; the flagellum consists 

 of 15 segments. 



The 2nd segment of pereopods I is broad, the anterior margin con- 

 vex, and the posterior margin straight; the distal margin of the 4th seg- 

 ment is straight and the lower distal angle not spoon- shaped as in other 



