HYPERIIDAE 



277 



Gnathopods 1 and 2 with 5th joint apically produced, compressed, knife-like. 

 Peraeopods 3-5 with 2nd joint rather broadly expanded. 

 Peduncles of uropods 1-3 stout, not elongate. 



Remarks. The very striking specimen for which this genus is proposed evidently has 

 relationships with Hyperoche, as for instance in the mouth-parts and gnathopods. 



Without sectioning it is impossible to say whether the " eyes " are normal functioning 

 eyes or not ; it seems possible that they may be composed only of the receptive elements 

 and serve to reflect or intensify light rays from other sources, though no pearly reflector 

 seems to be present (cf. Woltereck, 1909, p. 164 sqq.). 



The enlargement of the flagellum of antenna 1 may be correlated with the simplifica- 

 tion (if any) of the eyes. 



Dr Kemp informs me that during the cruise of ' Discovery II ' a second specimen of 

 this interesting form was captured, but the specimen has not been submitted to me as 

 yet. 



Pegohyperia princeps, Brnrd. (Figs. 162-164 and Plate I, figs. 5, 5 a). 

 Barnard, 193 1, p. 430. 

 Occurrence : St. 85. South-east Atlantic. 1 ? with embryos 28 mm. 



Description of ?. Integument firm and indurated, shagreened and minutely 

 punctate all over. Head moderately enlarged, the lower anterior margin produced into 



Fig. 162. Pegohyperia princeps, Brnrd. a. General view. b. Antenna 1 with lower margin of flagellum further 

 enlarged, c. Antenna 2. d. Gnathopod 1, with portions of margins further enlarged, e. Gnathopod 2. 

 /. Peraeopod i, with portions of margins further enlarged. 



