225 



Part III. — Twenty-first Annual Report 



Raia batis, Lin. 



A specimen of Grey Skate, measuring sixteen-and-a-quarter inches 

 across the pectoral fins, had in its stomach the remains of Crangon 

 allmanni, but apparently nothing else. 



Raia fullonica, Lin. 



A specimen of Fuller's Eay, measuring fifteen-and-a-half inches across 

 the pectoral fins, had also been feeding on Crustacea, but the species 

 could not be determined. 



Raia radiata, Donovan. 



The stomach of a small Starry Ray was found to contain only the 

 remains of fish too imperfect for identification. 



The three fishes referred to above, which had been obtained from a 

 trawling steamer working in the North Sea, were examined in March 

 1902. 



Squalis acanthias, Lin. 



A considerable number of Picked Dog-fishes have been examined for 

 ecto- and ento- parasites, and as their stomachs were also examined, I 

 append some observations on the food observed in the stomachs of these 

 specimens. The number of specimens referred to here is twenty-two. 

 They were captured in the North Sea, and forwarded to the Laboratory 

 during the month of March 1902. Eight were examined on the 7th, 

 four on the 14th, and ten on the 26th of the month. 



Size of the 

 Fish. 



Contents of the Stomach. 



3 feet 6^ inches. 



Nothing that could be identified. 



2 



55 



8| „ 



Only the remains of round fishes. 



2 



5 J 



n „ 



A moderately large Herring. 



o 



55 



94 ,5 



Only two small Dabs. 



2 



5 > 



m ,5 



The food was very much digested, but consisted apparently 

 of fishes, as the two ear-stones of a small Whiting were 

 obtained. 



2 



55 



104 » 



Part of a full-grown Herring was observed. 



2 



>J 



9 „ 



Part of a young Coal-fish. 



3 



55 



14 „ 



The remains of fishes, but the species was not determined. 



2 



?1 



6 „ 



The remains of one or two Long Rough Dabs. 



2 



55 



84 5, 



The remains of fishes, but the species doubtful. 



3 



55 



o „ 



The contents of this stomach was similar to the last. 



2 



55 



5 



Contents similar to the last. 



o 



55 



84 „ 



Fragments of two Gadus esmarlcii. 



2 



55 



11 „ 



Two nearly whole Gadus esmarkii and remains of others, 

 also a portion of the testes of a moderately large Gadoid. 



2 



55 



6 ,, 



The only objects in this stomach that could be distinguished 

 were a few fish eggs. 



2 



55 



8 „ 



One small Gadus esmarkii and the remains of another. 



2 



55 



11 



A Herring about 94 inches long. 



2 



55 



74 5, 



Fragments of a Lemon Sole about S or 9 inches long, a 

 Gadoid about 64 inches, and the remains of a fish, not 

 determined, about 9 or 10 inches long. 



2 



55 



6 „ 



Fragments of a moderately large Herring and a small 

 Gadoid. 



2 



5 5 



H „ 



Remains of a Gadoid and a Sand-eel. 



2 



55 



74 „ 



Fragments of a moderately large Herring, and some other 

 fish remains. 



2 



'5 



S* „ 



Fragments of a large Herring, and other fish remains. 



