KONGL. SV. VKT. AKADEMIENS IIANDLINGAK. BAND. 22. N:() 7. 101 



the cai'[)til |)rocess is spoon-shapcd, showing two aiitcrior margins, serratcd or friiigcd witli 

 bristles, and distinct from one another; herc in Ii3'peroclie tlie original inner margin is 

 coalesced witli thc outer tluis forming only one edge-likc margin, just as the blade and 

 cdge of a knife. A trace of the inner anterior margin of the carpal process is to be secn 

 at the base of the process, especiallj' 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- 

 carpiis. 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 (Pl. VII, tig. 12) is gently curved, serrated along the u])per part 

 of the hind margin; it equals about a third of the length of the metacarpus. G lan ds 

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



The second pair (Pl. VII, fig. 13) are only a little longer than the first ]jair. 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 carpus 

 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. ^) 



The third pair (Pl. 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 with 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, 

 sharpl}' serrated. The lower half of the hind margin is divided into two margins or 

 edges b}' a fissure, or narrow groove, which i'eceives a ])art of the cdge 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 sida of the carpus is obli(|uely truncated, or 



') Stebbinr says 1. c. p. 1401 about the dact^ilus of the secoiul pair of penBopoda of his new species 

 Hijperoche cryptodactylus. that it caii be retracted iuto the metacarpus. This is the principal difference betvveen 

 Hyperoche Liietkeni and H. cryptodactyliis; I have examiried and reexamined uumerous specimens of H. 

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

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

 pl. 170, lig. gn^, 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 cjuestion, they congrue, however, in almost all the otlier characteristics. 



