94 CARL BOVALLIU6, AMPHIPODA HYPERIIDEA. I. 2. HYPERIID^. 



fiyperoc/iepye/ie/fs?'^, SPENCEBATEand WESTWOOD. C. Bovallius. 1887. "Systeraatical list of the 



Amphipoda Hyperii- 

 dea». Bih. t. K. Sv. 

 Vet. Ak. Handl. Bd. 

 11. N:o 16, p. 19. 



It is possible that the subcheliforai shape of the last three pairs of perasopoda is 

 not a characteristic of specific value, but depeiiding oiily on the youiig age of the animal. 

 The statements of Fritz Muller about Hyperoche Martinezii, seein to coiToborate this 

 view. The loiig, narrow hands of the first two pairs of perasopoda, and the shortness of 

 the last three pairs are good characteristics for Hyperoche prehensiles, and distinguish 

 it from H. Kroeyeri, which it coraes near in general habitus of the body. 



The original description of Spence Bate and Westwood runs: 



^)S'pecific character. Superior antennas about the length of the head. Both pairs 

 of gnathopoda with the carpus and propodos sini))le. Three hind pairs of perajopoda sub- 

 prehensile at the tips. 



Length, three twentieths of an inch. 



This species diffei^s from H. tauriformis next described in having longer antennas, 

 the proximal margins of the carpus and propodos of both pairs of gnathopoda not serrated, 

 and in having the propodos of the last three pairs of peraiopoda inferiorly produced and 

 armed with short strong cilia. This gives a prehensile character to the last three pairs 

 of pereiopoda that we have not recognized in other species». 



3. HYPEROCHE ABYSSORUM, A. BOECK, 1870. 



^\ 



Hyperoche abyssorum, A. Boeck. 



Facsimile from A. Boeck. De Skand. og Arkt. Amphip. Pl. I, fig. 2. 



Fig. 1. The first pair of anteimae. 2. The seeond pair of antennee. 3. The first pair of peraeopoda. 4. The 

 second pair. 5. The third pair. 6. The fifth pair. 7. The urus. 



Diagn. Processus tibialis j^edic^n percei primi paris basin processus carpalis non attingens; margo an- 

 terior processus carpalis serratus, marginem posteriorem metacarpi longitudine fere jequans; 

 dactylus non serratus. Carpus pedum tertii ac quarti parium non dilatatus; margo poste- 

 rior rectus, serratus. Pedes parium trium ultimorum pedibus parium duorum priEcedentium 

 non longiores: femur angustum; metacarpus mediocris, metacarpum pedum tertii ac quarti 



