94 CARL BOVALLIUS, AMPHIPODA HYPERIIDEA. I. 2. HYPERIID^E. 



Hyperocheprehensilis, SPENCE BATE and WESTWOOD. C. Bovallius. 1887. "Systematical list of the 



Amphipoda Hyperii- 

 dea->. Bih. t. K. Sv. 

 Vet. Ak. Haudl. Bd. 

 11. N:o 16, p. 19. 



It is possible that the subcheliform shape of the last three pairs of perseopoda is 

 not a characteristic of specific value, but depending only on the young age of the animal. 

 The statements of Fritz Mueler about Hyperoche Martinezii, seem to corroborate this 

 view. The long, narrow hands of the first two pairs of perseopoda, and the shortness of 

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

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



r 



The original description of Spence Bate and Westwood runs: 



^Specific character. Superior antennae about the length of the head. Both pairs 

 of gnathopoda with the carpus and propodos simple. Three hind pairs of pergeopoda sub- 

 prehensile at the tips. 



Length, three twentieths of an inch. 



This species differs from H. tauriformis next described in having longer antennae, 

 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 perajopoda 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. 



N?\ 



ff/jperoche abyssorum, A. Boeck. 



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



Fig. 1. The first pair of antennae. 2. The second pair of antennae. 3. The first pair of perseopoda. 4. The 

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



Diagn. Processus tibialis pedum perai pfimi paris basin processus carpalis non attingens; mai-go an- 

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

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

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

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



