SYSTEMATIC INDEX. XIH 



5. ridibundus, Linn. 59 



6. marinus, Linn. ... ... .. ... ... ... 63 



7. fuscus, Linn 66 



8. argentatus, Gm. ... ... ... ... ... .. 70 



9. canus, Linn. ,, ... ... ... ... ... 73 



10. hyperboreus, Gunn. ... ... ... ... ... 76 



11. leucopterus, Faber. 79 



CCX. Pagophila, Kaup 81 



I. eburnea (Phipps). .. ... ... ... 81 



CCXL RissA, Steph 84 



I. tridactyla (Linn.). 84 



FAMILY STERCORARIID.E. ... 89 



CCXIL Megalestris, Bp. 89 



I. catarrhactes (Linn.). ., 90 



CCXIIL Stercorarius, Briss 93 



1. pomatorhinus (Temm.). ... ... ... ... ... 93 



2. crepidatus (Banks). ... ... ... 97 



3. parasiticus (Linn.). loi 



SUB ORDER ALC^ 105 



CCXIV. Alga, Linn 106 



I. torda, Linn. ... ... ... ... ... ... 106 



CCXV. Plautus, Brlinn no 



I. impennis (Linn.). ... ... ... ... ... ... in 



CCXVL Uria, Briss 114 



1. troile (Linn.) II4 



2. ringvia, Lath, 119 



3. bruennichi, Sabine. 120 



CCXVIL Cepphus, Pall. 123 



I. grylle (Linn.). ... 123 



CCXVIIL Alle, Link 127 



I. alle (Linn.) 127 



CCXIX. Fratercula, Briss 130 



I. arctica (Linn.) 130 



ORDER PROCELLARIIFORMES i35 



FAMILY PROCELLARIID^ 135 



