518 Part III. — Twentieth Annual Report 



was too imperfect for satisfactory identification. In the stomach of a Pollack 

 captured in the Bay of Nigg in the nets of tlie salmon fishers on February 

 19th, 1900, the remains of several small fishes and Schizopods (Schis- 

 toinysis spiritus) were observed. The following Crustacea were obtained 

 in the stomach of another Pollack received from the salmon fishers on 

 April 2nd, 1900, viz. : — Idofhea emarginata, Idothea hcdfica, Idoiliea 

 pelagica, and Idothea linearis; Amathitla homari, Parajassa pelagica, 

 CapreUa septentrionalis, and fragments of some other species. There 

 was also a post-larval Eel in this stomach. Two stomachs 

 obtained from the salmon fishers — one on April 16tli and one on the 

 17th — contained the following organisms : — Idofhea pelagica, Idothea 

 emarginata, and Idothea linearis ; Amatliilla homari, Hyale nilssoni, 

 Gaprelta septentrionalis, and remains of other Amphipods. A young 

 Pollack about 47 1 centimetres (19^^^ inches) in length was re- 

 ceived from the salmon fishers on April 18th, and in its stomach the 

 following Crustacea were obtained : — Schistomijsis spiritus, Idothea 

 tjaltica, Idothea pelagica, Idothea emarginata, Q.ndi Gaprelta septentrionalis, 

 as well as the remains of some Annelids. In the intestines of this fish 

 over two hundred specimensof the cestoid parasite — Echinorhynchasaciis — 

 were obtained, as well as a few nematodes. Another stomach received on 

 April 19th contained an immense number of CapreUa septentiionalis, as 

 well as the remains of other Crustaceans and of Sand-eels. In a stomach 

 received from the salmon fishers on June 6th the remains of Amphipods, 

 the genus and species of which were doubtful, was the only food 

 observed. 



In the stomach of a Pollack received from the salmon fishers in July 

 of this year (1901) CapreUa sepdentrionalis was again common. The 

 frequent appearance of this CapreUa in the stomachs of these fishes 

 seems to indicate that it must be more or less abundant somewhere in the 

 vicinity of the Bay, and that it is a favourite kind of food with the 

 Pollack. 



A Pollack about 27 centimetres in length, taken in 60 fathoms otf 

 Aberdeen on October 3rd, 1901, had the following organisms in its 

 stomach : — A small round fish too imperfect for identification (its length 

 would be about 9 centimetres), three or four Pandalus montagui, a few 

 small Decapods (sp. ?), Hyperia galba, and a few Schizopods belonging to 

 Mysidse. 



The following organisms were obtained in the stomachs of four 

 Pollack taken in St. Andrews Bay in the salmon fishers' nets during May, 

 1901. These specimens measured about 43, 50, 51, and 62 centimetres 

 in length respectively. The stomach of the first contained the remains of 

 fish, one or two small Cephalopods and Crustacean and Annelid 

 remains, but not sufficiently perfect for satisfactory identification. The 

 second contained a large Sancl-eel, Ammodytes sp. The third contained a 

 specimen of Onos sp. {Motella) about 12 centimetres long; but in the 

 fourth there was nothing that could be identified. 



A sample consisting of six specimens which were sent from Giivau, 

 Firth of Clyde, in May, 1901, had scarcely any food in their stomachs 

 that could be satisfactorily identified. The specimens measured from 27 

 to 28 centimetres in length, and the stomach of one of them contained a 

 small Lahrux, very imperfect ; while the remains of Crustacea (probably 

 of Crangon sp.) were observed in three. The contents of the other two 

 stomachs were very much decomposed. Three specimens were sent from 

 Girvan on October 15th, 1901, the length of which measured 23 1 cm., 

 33 cm. and 43 cm. respectively. The food contained in the stomachs of 

 this sample consisted entirely of the remains of small Herrings or Sprats 

 about 3 inches (75 mm.) long. 



