51 



in the rostrum, but I find that the lens is somewhat 

 rudimentary in the female thouo^h well developed in the 

 male, as shown by the figures now g^iven. 



(15) Monsfrilla anghca, Lubbock. — Plate IV. 

 Mention is made on page 4(! in last year's Eeport of 



the occurrence of a Monsfrilla in Liice Bay which 

 appeared to be rather diiferent from any of the described 

 species. A number of males of the same form were taken 

 oif Llanon on July 22nd. After a careful examination of 

 the appendages, I am inclined to regard it as only a 

 variety of Lubbock's species. The fifth feet of the female 

 are much longer and narrower than in typical specimens, 

 and the male has a peculiar comb-like structure on the 

 inner margin of the last joint of the antennules. 



(16) Corycaeus angJicus, Lubbock. 



Specimens of this rare Copepod were taken in a 

 plankton collection from Fishguard Bay on Xovember 

 11th, 1905. The late I. C. Thompson found it at Port 

 Erin, but this is the first record of its appearance in the 

 coastal waters of Wales. 



(IT) GiardeUa thomjjsoni, n. sp.— Plate III. 



Description of the male : Length, exclusive of f ureal 

 hairs, 1"87 mm. ; body seen from above, cyclopoid in 

 outline, moderately robust ; antennules slender, seven 

 jointed, about as long as the cephalic segment, third joint 

 very short, fourth and seventh joints longer than any of 

 the others; antennae and mouth organs (figs. o-T) nearly 

 similar to those of G. callianassae , Canu ; swimming feet 

 also like those of the type ; endopodites in every pair 

 longer than the exopodite ; fifth feet two-jointed, narrow, 

 and longer than the genital segment, outer margin of 

 second joint furnished with two small spines ; apex of the 

 joint with a spine and a hair; abdomen five-jointed, 

 fourth joint much shorter tlian tlie others: furca 



