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Proceedings of Royal Society of Edinburgh. [sess. 
ridiotcenia erostris, var. minor, Lonnberg), from Fulmarus gla- 
cialis, L. 
3. P . umbrella , Fuhrmann, from Diomedea sp. (?). 
4. P. torulosa (Linstow), (syn. Tetrabothrium torulosum , Lin- 
stow), from Diomedea brachyura , Temm. 
5. P. macrocephala (Rud.), (syn. Taenia immerina , Abildgard (?), 
Khytis immerina , Zeder (?), Bothriocephalus macrocephalus , Rud., 
Tetrabothrium macrocephalum , Rud., T. Zedri , Baird, T. Colymbi , 
Troiles Yiborg (?)), from Colymbus glacialis, L., (7. sejptentrionalis , 
L„, (7. arcticus , L., Podiceps cristatus, L., P. cornutus , Gm., Uria 
troile, L., Aptenodytes sp. (?), Tot anus glareola , L. (?). 
6. P. juncea (Baird), (syn. Bothriocephalus junceus, Baird, 
Tetrabothrium junceum, Baird), from S ar cor amphus papa, L. 
7. P. cylindracea (Rud.), (syn. Bothriocephalus cylindraceus , 
Rud., Tetrabothrium cylindraceum , Rud., Bothridiotcenia cylin- 
dracea, Rud.), from Larus glaucus, Briinn, P. atricilla , L., P. 
ridibundus , L., P. canus, Briinn, P. marinus, L., fc tridactyla, 
L. 
8. P. erostris (Lonnberg), (syn. Taenia erostris, Lonnberg, 
Bothridiotcenia erostris, Lonnberg), from Larus marinus, L., 
P. canus, Briinn, P. fuscus, L., P. argentatus, Briinn, Rissa 
tridactyla, L., Sterna sp. (?). 
9. P. eudyptidis (Lonnberg), Fuhrmann, (syn. Bothridiotcenia 
erostris , var. eudyptidis, Lonnberg), from Eudyptes catarractes, Gm. 
10. P.heteroclita (Dies.), (syn. Tetrabothrium heteroclitum, Dies., 
Amphoterocotyle elegans, Dies., Tetrabothrium auriculatum, Lin- 
stow), from Daption capensis, L., Thalassoeca glacialoides (Smith). 
11. P. intermedia, Fuhrmann, from Procellaria sp. (?). 
12. P. campanulata , Fuhrmann, from Procellaria sp. (?). 
13. P. pelecani aquilce (Rud.), (syn. Tcenia pelecani aquilce , 
Rud., Tcenia heterosoma, Baird, Tcenia sulce fuscce, Baird), from 
Atagen aquilus , L., Sula fusca, Viellot. 
14. P. sulciceps (Baird), (syn. Tcenia sulciceps, Baird), from 
Diomedea exulans , L. 
15. P. porrigens (Molin), (syn. Tetrabothrium porrigens, Molin), 
from Nystiardea nycticorax, L., Larus melanocephalus, ISTatt. (?). 
16. P. triangulare (Dies.), (syn. Tetrabothrium triangular e, 
Dies.), from Delphinorhynchus restrains, Guv. 
