1. Fur-seals fanning themselves (C. Bertram)
Head of grey seal
Head of Californian sea-lion
2. Porth Laoug, Ramsey Island, Pembrokeshire
Beach on Eilean nan Ron, Oronsay, Inner Hebrides
3. Shell-sand beach and herd of grey seals, Shillay, Outer Hebrides
Breeding rookery in wallows, Shillay, Outer Hebrides (R. Atkinson)
4. Breeding rookery in central Fianuis, North Rona (J. M. Boyd)
Ring-marking a moulter, North Rona (J. M. Boyd)
5. Shore rookery, Muckle Greenholm, Orkney (J. Woolston)
Breeding rookery, Staple Island (and Brownsman), Farne Islands (J. C. Coulson)
6. Aerial view of Gasker, Outer Hebrides (W. St. C. Reid in Boyd, J. M. 1957)
Bull and cow grey seals at wallow, North Rona
7. Territorial grey seal bull, Brownsman, Farne Islands
Breeding grey seal cow, Brownsman, Farne Islands
8. Longitudinal section of root of canine tooth of grey seal
Two canine teeth from 1st year grey seals
Two adult canine teeth (bull and cow) grey seals
Cement layers in tooth of 8-year-old grey seal
Cement layers in tooth of 18-year-old grey seal
9. Section of immature testis of grey seal
Section of mature but resting testis of grey seal
Sections of mature and active testes of grey seal
10. Section of immature epididymis of grey seal
Section of mature but resting epididymis of grey seal
Section of mature and active epididymis of grey seal
Abdominal testis in ‘82-day’ foetus grey seal
11. Section of ovary with developing oocytes, grey seal
Right and left ovaries in section, grey seal
12. Free blastocyst in utero, grey seal (R.Cox)
Young embryo (c. 31 days), grey seal
Early foetus (c. 55 days) in utero, grey seal
13. Early male foetus (c. 62 days), grey seal
Young male foetus (c. 72 days), grey seal
Later male foetus (c. 113 days), grey seal
14. Moulting haul-out at Aber Foel Fawr, Ramsey Island
Closer view of the moulting haul-out at Aber Foel Fawr (K. M. Backhouse)
15. Two types of moulting grey seal pups, Ramsey Island
16. Newly-landed grey seal bull, shell-sand beach, Shillay
Grey seal cow giving birth, Farne Islands (W. N. Bonner)
17. Newly-born grey seal pup, Ramsey Island
Grey seal pup with erupting teeth, Ramsey Island
18. Grey seal cow identifying her pup by smell, Ramsey Island
Grey seal cow attacking pup not her own, Shillay
19. Grey seal pup suckling, Farne Islands
14-day-old grey seal pup, Ghaoidmeal, Inner Hebrides
20. Grey seal pup in typical early moult, Scroby Sands, Norfolk (J. Woolston)
Grey seal bull moulter, Ramsey Island
21. Two grey seal bulls contesting territory, North Rona
Grey seals in copulation, Farne Islands (J. C. Coulson)
22. Branded grey seal cow, Farne Islands (J. C. Coulson)
Grey seals hauled-out on West Hoyle Bank, Cheshire (J. C Gittins)
23. Common seal cow and pup, the Wash (W. N. Bonner)
Two common seals (heads), the Wash (W. N. Bonner)
24. Common seals hauled-out on sandbank, the Wash (W. Vaughan)
Common seal bull ‘salmon-leaping’, Mousa, Shetland
1. External features of seal and sea-lion
2. Limb-bones of seal and fur-seal
3. Skulls of seals (grey and common) and of sea-lion
4. Side view of pinnipede body
5. Bradycardia in seal, porpoise and manatee
6. Kidneys and posterior vena cava in seals
7. World distribution of the grey seal
8. The origin of the three populations of grey seals
9. Distribution of grey seals in British waters – recorded sightings
10. Distribution of grey seals in British waters – breeding areas
11. External differences between grey and common seals and between bull and cow grey seals
12. Jaws and teeth in grey and common seals
13. Growth and maturation of the os penis
14. The os penis index
15. Distribution by age of cow and bull grey seals
16. The male genitalia of the grey seal
17. Growth and maturation of the testis in the grey seal
18. Variations during the year in adult testicular weights in the grey seal
19. The female genitalia of the grey seal (adult)
20. The female genitalia of the grey seal at birth
21. Foetal growth rate in the grey seal
22. Counts of grey seals on West Hoyle Bank and on the Farne Islands