106 CAUL BOVALLIUS, AMPHIPODA HYPERIIDEA. I. 2. HYPERIIDiE. 



Hyperoche cryptodactylvs. 



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

 riorly angulated, sharp-pointed. The first pair of uropoda 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 

 scarcely longer than the breadth of the peduncle. The telson equals a third of the length 

 of the peduncle of the last pair of uropoda. 



Colour. ? 



Length. About 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, pi. 170. 



As mentioned above Hyperoche cryptodactylus comes very near to the male 

 form of H. Luetkeni, differing from it by the retractile character of the dactyhis of the 

 second pair of perEBopoda, and by some other characteristics of not very high importance. 



For a fnller account of the species I refer to the description and drawings given 

 by Stubbing, 1. c. p. 1399 to 1402, plate 170. Here I reproduce only the passage re- 

 garding the retractility of the dactylus of the second pair of perseopbda. Stebbing says 

 1. 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 likely enough 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.)) 



