of the Fishery Board for Scotland. 



171 



tc Charopinu* ramosus. 



Laminae, quibus affigitur femina, oxterius in ramos binos elongatos 

 graciles, crucera fere, efficientes products©." 



My specimens differ from both of these species in the important 

 characters specially referred to ; they also differ in their habitat. Ch. 

 dalmanni has been found only in the spiracles of the grey skate ; Ch. 

 ramosus was found by Kroyer on the gills of the Thornback skate, Rata 

 clavata, Linn.,* whereas the form 1 am now recording was found attached 

 to the gill-arches (chiefly; and on the gills of Raia circularis. 



Different specimens of Ch. dubius differ somewhat in the proportional 

 lengths of the parts. The following tabular statement shows the lengths of 

 two fairly typical specimens, to which the sizes of Ch. dalmanni are added 

 for comparison : — 



Length of 



Charopinus dubius. 



Charopinus 

 dalmanni. 



No. 1. 



No. 2. 



Second maxillipedes, ..... 



Anterior portion of thorax and head, . 



Posterior portion of thorax, 



Posterior appendages, ..... 



Ovisacs, ... ... 



Apex of second maxillipedes to end of ovisacs, 

 Apex of second maxillipedes to posterior end 



11 mm. 



6 „ 

 8-5 „ 



4 „ 



18 „ 

 37 „ 



19 „ 



11 "5 mm. 

 5 

 6 



4 „ 



damaged 



18 mm. 



22 mm. 

 9 



15 „ 

 10 „ 

 20 „ 

 55 „ 



Genus Lernwopoda, Kroyer (1837). 



Specimens of Lernaiopoda have been obtained on a number of 

 different kinds of fishes, and several species appear to be represented 

 among them, but some of the so-called species approximate so closely as 

 to render their identification somewhat difficult. Five species are 

 recorded here. 



Lermeopoda (?) elongala (Grant). (PL VIII., figs. 11-15.) 



1827. Lernoba elongata, Grant, Brewster's Edin. Journ. Sci., vol. 

 VII,, p. 147, PL II., fig. 5. 



1850. Lernceopoda elongata, Baird, Brit. Entom., p. 333, PL 

 XXXV., fig. 5. 



The specimen I record under this name is rather smaller than those 

 occasionally described, but it apparently agrees with the species named 

 in some at least of its more important characters, i.e., the form of the 

 cephalic shield, the large and well-developed anterior pair of maxillipedes, 

 and the very long and slender posterior maxillipedes. The abdomen is 

 very short, and the posterior processes of the genital segment are almost 

 obsolete. 



The entire length of the specimen represented by the figure was at 

 least three-quarters of an inch, and it was obtained on a porbeagle 

 shark, Lamna cornubica. Where the fish was captured I cannot exactly 

 say, though probably it was in the North Sea, somewhere off the Scottish 

 coasts. 



*Op. cit, p. 358. 

 L 



