378 



308 1. Hyperioides longipes Chevreux, 1900 (Fig. 160) 



Chevreux, 1900: 143; Lo Bianco, 1901: 422, 447; 1904: 43; Walker, 

 1903: 229; Chevreux and Page, 1925: 407; Bowman, 1973: 33. 



Length of adult specimens 5-7.5 mm. 



The head is equal in length to five somites of the pereon, trapezoid, 

 with the frons overhanging the base of antennae I. The eyes occupy 

 only the dorsal surface of the head. Antennae I in females are very 

 short, extending only to the site of attachment of antennae II; the flag- 

 ellum is one-segmented and conical in females and multisegmented in 

 males. Antennae II in females are very small, rudimentary, but longer 

 than half the length of antennae I; in males the flagellum of antennae II 

 is multisegmented and much longer than in antennae I. 



The 5th segment of pereopods I is equal in length and width and 

 the posterior distal angle is stretched into a narrow lobe extending to 

 half the length of the broadly oval 6th segment. Pereopods II are some- 

 what longer than pereopods I; the lobe of the 5th segment extends to 

 2/3 the length of the narrowly oval 6th segment. Pereopods III and IV 

 are longer than pereopods II; the 6th segment is somewhat longer than 

 the 5th; the claw is strong and half the length of the 6th segment. Pere- 

 opods V-VI are much longer than pereopods III-IV; the 2nd segment is 

 relatively broader; the 6th segment is distinctly longer than the 5th. The 

 2nd segment of pereopods VII is approximately the same length as in 



Fig. 160. Hyperioides longipes Chevreux, female (after Bowman, 1973). 



