242 



CARL BOVALLItTS, AMPHTPODA HYPERTIDEA. I. 2. 



HYPERIID^E. 



A. The lateral parts of the pleonal segments are rounded behind. The lower front 

 corners of the femur, genu, and tibia of the last three pairs of perasopoda are 

 rectangular, not produced. The inner ramus of the last pair of uropoda is 



ovate _ _ _.__ _ 1. II. antarctica. 



B. The lateral parts of the pleonal segments are acutely produced behind. The 

 lower front corners of the femur, genu, and tibia of the last three pairs of pe- 

 raeopoda are acutely produced downwards. The inner ramus of the last pair of 



uropoda is narrowly elongate and sharp-pointed 2. H. ililatata. 



1. HYPERIELLA ANTARCTICA, C. BOVALLIUS, 1887. 



PI. XI, fig. 42—51. 



Hyperiella antarctica, C. Bovallius. 

 Drawn from the type specimen by A. M. Westergren. 



Diagn. Caput latum, segmentis tribus primis persei longius. Pedes perm quinti paris capite ac pe- 

 raeo conjunctis multo longiores. Anguli antero-inferiores femoris, genus et tibia? pedum 

 parium trium ultimorum non producti nee acuti. Metacarpus pedum sexti ac septimi pa- 

 rium carpo haud longior. Latera segmentorum plei post rotundata. Pedunculus pedum 

 uri ultimi paris quam telson quater longior, ramus internus ovattis. Telson segmento ul- 

 timo uri brevius, ac pedunculo pedum uri ultimi paris angustius. 



The head is broad, and longer than the first three pergonal segments together. The fifth pair 

 of pera'opoda are much longer than the head and peraeon together. The lower front corners 

 of the femur, genu, and tibia of the last three pairs are not produced, nor sharp-pointed. 

 The metacarpus of the sixth and seventh pairs is not longer than the carpus. The lateral 

 parts of the pleonal segments are rounded behind. The peduncle of the last pair of uro- 

 poda is four times as long as the telson; the inner ramus is ovate. The telson is shorter 

 than the last ural segment and narrower than the peduncle of the last pair of uropoda. 



