70 AMPHIPODA. 



commencement of the palm. Second gnathopod (fig. 2) of 

 slightly stouter build than in the two preceding species ; the 

 hand gently arched near its junction with the wrist. Chela 

 about two and a half times as long as the breadth at its base ; 

 the thumb not twice as broad as the finger. The projected 

 carpus (fig. 3) reaches just beyond the extremity of the 

 thumb, round which it curves with a blunt rounded extremity. 

 The rostrum is more produced than usual in the genus, and 

 bends downwards with an even curve. The basal joint of 

 the last perseopods (fig. 4) has its hind margin gently curved ; 

 the entire limb is of even greater length than usual in the 

 genus. 



The chief character in this species is found in the second 

 gnathopod ; in this, as in the following species, the carpal 

 lobe is just sufficiently long to curve round the extremity of 

 the thumb and there end bluntly, but the chela is longer 

 and much more slender than in Pontocrates arcticus. The 

 foregoing description is taken from A. M. N/s Shetland 

 example, which was the type of Bate and Westwood's species. 



" Two specimens were taken on the bar r at Salcombe 

 (R. A. Todd, vi. p. 203). 



[PONTOCRATES ARCTICUS, Sars. (PI. VII. figs. 5, 6.) 



1883. Pontocrates norvegicus, J. Sparre Schneider, " Xorges kyster 

 forekommende Arter af farnilien CEdiceridfe," TrorusS Museums 

 Aarsliefter, vol. vi. p. 17, pi. ii. tig. 15, and pi. iii. figs. 21, "22. 



1889. Pontocrates norvefficus, Hoek, " Crustacea Neerlandica, II.," 

 Tijdsch. Nederl. Dierk. Vereen. ser. 2, vol. ii. p. 24, pi. ix. tigs. 8k 

 &Sk'. 



1892. Pontocrates norvegicus, Sars, p. 315, pi. cxi. fig. 2. 



1895. Pontocrates arcticus, Sars, p. 093. 



The first gnathopod is very like that of the last species ; 

 but the hand is rather broader in proportion to the length, 

 and the carpal process longer and reaches to more than half 

 the length of the hand. The hand of the second gnathopod 

 (fig. 5) is more strongly built than in its allies, and especially 

 the chela (fig. 6), which is very short and strong, its length 

 scarcely greater than its breadth across the base ; and the 

 thumb is fully twice as wide as the finger. The projected 

 portion of the carpus is extended straight forwards, and 

 reaches a little way beyond the end of the thumb and termi- 

 nates in a small backward-turned spine-point. The rostrum 

 is short and rather suddenly deflexed. The hind margin of 

 the basal joint of the last peneopod is very slightly curved, its 

 margin crenulated with a seta set in each crenatiou. 



So far as we are aware, this species has not as yet been 

 found south of the Arctic circle. Sars took it at Hasvig, in 



