SEA-FISHERIES LABORATORY. 195 



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

 rudimentary in the female though well developed in the 

 male, as shown by the figures now given. 



(15) Monstrilla anglica, Lubbock. — Plate IV. 

 Mention is made on page 46 in last year's Report of 



the occurrence of a Monstrilla in Luce Bay which 

 appeared to be rather different from any of the described 

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

 off 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 anglicus, Lubbock. 



Specimens of this rare Copepod were taken in a 

 plankton collection from Fishguard Bay on November 

 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. 



(17) Giardella thompsoni, n. sp.— Plate III. 

 Description of the male : Length, exclusive of furcal 



hairs, 1*37 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. 3-7) nearly 

 similar to those of G. callia?iassae, 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 than the others; furca 



