lOG CARL BOVALLIUS, AMPHIfODA HYPRRIIDEA. I. 2. HYPERIID^. 



fiyperoclie crypiodaciylus, 



is dilated, the metacarpus mediocre. The lateral parts of the iileonal segments are poste- 

 riorly angnlated, sliarp-pointed. The first pair of vropoda reach to the apex of the last 

 pair; the outer ramus is shorter than the inner one. The inner ramus of the last pair is 

 scarcelj' longer than the breadth of the peduncle. The tehon equals a third of the length 

 of the peduncle of the last pair of m-opoda. 



Colour. ? 



Length. Abont 7 mm.; (»from the front of the head to the back of the second pleon-segment, about 

 one fifth of an inch», Stebbing). 



Hab. Near the Cape of Good Hope, at Lat. 34° 41' S., and Long. 18° 36' E. (Ch. E., Sta- 

 tion 141.) 



Syn. 1888. Hyperoche cryptodactylus, TH. STEBBING. »Report on the Amphipoda». Voy. of H. M. S. 



Challenger. Zoology. Vol. 29, p. 1399, pl. 170. 



As mentioned above Hyperoche cryptodactylus comes very near to the male 

 form of H. Luetkcni, differing froin it by the retractile character of the dactylus of the 

 second pair of pera^-opoda, and by soine other characteristics of not very high importance. 



Fov a faller account of the species I refor to the description and drawings given 

 by Stkbbing, 1. c. p. 1899 to 1402, plate 170. Here I reproduce on\j the passage re- 

 garding the retractility of the dactylns of the second pair of perajopoda. Stebbing says 

 f. c, p. 1401: " " 



»In these gnathopods, and apparently in the first also, the finger can be retracted 

 into the hand (=- metacarpus) for almost its whole length, if not for the whole length." 



And further, p. 1402: 



»It is of course likelj' enoiigh that the character, though first observed in the 

 present species, may be common to all the species of the genus, since in other respects 

 they are separated only by small distinctions.» 



