42 Canon A. M. Norman on British Amphipoda. 



1882. Metopa rubrovittata, G. 0. Sars, (102) p. 90, pi. iv. figs. 2, 2 a. 

 1892. Metopa rubrovittata, G. O. Sars, (142) p. 255, pi. lxxxix. fig. 2. 



Bab. Cullercoats, Northumberland, Oct. 5, 1854. Fresh 

 specimens, mounted in Dean's medium at that date, have now 

 their beautiful crimson markings perfectly preserved, exactly 

 corresponding to Sars's coloured drawing. Isle of Cumbrae ; 

 Lerwick Bay, Shetland {A. M. N.) : Mus. Nor. Off north 

 side of Little Cumbrae, 10-15 fathoms (D. R.) ; North Wales 

 (A. 0. W.). 



Distrib. Christiansund, Norway, and Vadso, East Finmark 

 (G. 0. Sars); Kattegat {Meinert) ; Holland (Hoek) ; West 

 France ( Chevreux) . 



101. Metopa abscisa *, sp. n. (PI. III. figs. 6-10.) 



1869. Montayua clypeata, Bate & Westwood, (1) vol. ii. p. 499 (nee 

 Lettcothoe clypeata, Kroyer). 



Upper antennae with two first joints of peduncle subequal, 

 third not quite half length of second ; flagellum about two 

 and a half times as long as the peduncle, consisting of about 

 17 articulations. Lower antennae shorter than the upper, its 

 flagellum shorter than the peduncle ; last joint of peduncle 

 slightly longer than the penultimate. 



First gnathopods (figs. 6 and 7) with the hand a little 

 shorter than the carpus, oblong, upper and lower margins 

 parallel for the first two thirds of the length, from which 

 point the hinder margin curves upwards to the base of the 

 nail ; nail short, not one third the length of the hand ; hand 

 with a few setse but no spines. 



Second gnathopods (figs. 8 and 9) with the hand oblong, 

 slightly widening distally, breadth equalling from one half to 

 three fourths of the length ; palm absolutely transverse, some- 

 what shorter than the margin ; not toothed and scarcely 

 waved, bounded by a tooth-formed process, near to which the 

 palmar margin is extremely minutely serrated (but the serra- 

 tions are so minute that they are only visible under a high 

 magnifying-power) ; finger very stout and strong. 



Last perasopods (fig. 10) with the meros and carpus sub- 

 equal in length, the hinder lobe of the meral joint small, not 

 reaching beyond half the length of the carpus ; propodos 

 much longer than the preceding joints; nail as long as the 

 carpus, the tip turned inwards, with a little seta at the base of 

 the tip. 



Telson devoid of dorsal spines. 



* Abscisa, u cut off," in reference to the truncate extremity of the 

 hand of the second gnathopods. 



