KONGL. SV. VET. AKADEMIENS HANDL1NGAK. BAND. 22. N:0 7. 101 



the carpal process is spoon-shaped, showing two anterior margins, serrated or fringed with 

 bristles, and distinct from one another; here in Hyperoche the original inner margin is 

 coalesced with the outer thus forming only one edge-like margin, just as the blade and 

 edge of a knife. A trace of the inner anterior margin of the carpal process is to be seen 

 at the base of the process, especially in young males, forming a semicircular wall or ridge. 

 The front margin of the carpal process is almost as long as the hind margin of the meta- 

 carpus. The metacarpus is feebly tapering towards the apex; it is nearly three times as 

 long as broad at the base; the front margin is almost straight, smooth; the hind margin is 

 feebly convex, armed with more than twenty sharp-pointed teeth, like those on the front 

 margin of the carpal process; the under margin is armed with small, but sharp-pointed 

 teeth. The dactylus (PI. VII, fig. 12) is gently curved, serrated along the upper part 

 of the hind margin; it equals about a third of the length of the metacarpus. Glands 

 are developed within all the joints, most richly in the femur. 



The second pair (PI. VII, fig. 13) are only a little longer than the first pair. The 

 femur is narrower than that of the preceding pair, more than three times as long as 

 broad. The genu is as long as broad, smooth. The process of the tibia is much shorter 

 than in the first pair, fringed with bristles. The front and hind margins of the car p us 

 are almost straight; the carpal process is a little longer than the rest of the joint; the 

 front margin is longer than the hind margin of the metacarpus, somewhat convex, armed 

 with sharp-pointed teeth as in the preceding pair. The metacarpus is more than three 

 times as long as broad at the base, the front and hind margins are somewhat curved; 

 the hind and under margins are armed as in the first pair. The dactylus is feebly 

 curved, serrated along the upper part of the hind margin. x ) 



The third pair (PI. VII, fig. 14). The femur is narrow, more than three times as 

 long as broad, the front margin is a little more curved than the hind one. The front 

 margin shows as usual a long narrow groove for the reception of the next following 

 joints, when they are bent upwards. The lower hinder corner of the femur is a little 

 produced, and tipped Avith a short bristle. The genu is somewhat more long than broad. 

 The tibia is more than twice as long as the genu, and twice as long as broad; it is 

 broader below than above. The carpus is longer than the tibia, somewhat dilated, three 

 times as long as broad; the front margin is feebly curved, the hind margin straight, 

 sharply serrated. The lower half of the hind margin is divided into two margins or 

 edges by a fissure, or narrow groove, which receives a part of the edge of the metacarpus, 

 the two joints thus forming a kind of scissors; the outer of these carpal edges is pro- 

 duced downwards into a process, more or less long according to the age of the spe- 

 cimens; in the very young ones this process forms only a rectangular, serrated corner. 

 The inner edge or margin of the hind side of the carpus is obliquely truncated, or 



! ) Stebbing says 1. c. p. 1401 about the dactylus of the second pair of peraeopoda of his new species 

 Hyperoche cryptodactylus, that it can be retracted into the metacarpus. This is the principal difference between 

 Hyperoche Luetkeni and H. cryptodactylus; I have examined and reexamined numerous specimens of H. 

 Luetkeni in different stages of development but I have never been able to find neither any signs to the re- 

 tractily of the dactylus, nor the form of the dactylus of the second pair of peraeopoda figured by Stebbing 1. c. 

 pi. 170, fig. gn 2 , where the dactylus seems to be cleft at apex. Such being the case I have not dared to unite 

 in one the two species in question, they congrue, however, in almost all the other characteristics. 



