b3. Primaries pearl—gray. tipped with white. and with well-defined gray spat-es 1111 the outer \\'1‘l|>‘ of the twn outer primaries and 011 both wehs 11t' the third and t'11urth primaries. l\'t'.\11.11= "s(lt'1.1.. Bill OVt‘l‘ 2'00 . . . . . . . . . . . 42. (i1..\1'1'111's (1111.. 0. Back grayish‘ whitish, or lirownish7 or muttled 111' spotted with gray- ish or ln‘u\\'ul.~'ll. (1. Tail bluek 111‘ hlaekish7 with or witlmut irregular white nun-kings. a1. Wing over 1730; depth of bill at nestril 11\'er "TU. ~17. Bi..\1~1{—1:.\1-1{1~:11 (i 11.1. (1111.). 0‘. Wing under 17'5”; depth of hill at 110stril under ‘70 {1111. AM.lllcttmxu(11‘1.1.11111.1. {11. Ill-JIUHNH (11"111. (1111.). [1. Tail white or whitish or grayish brown, with or without Lilael; 111arki11§_r s. (11. Bill under 201) . . . . . . . . . 43. ICELAND 011.1. (1111.). 1;”. Bill over 2'00 . . . . . . . . . . :5. GLArcut's ULLL (1111.). II. Wing under 15'00. 1. Tail pure white. .1. Head and throat slat)‘ lilac-k. a. Hitter primary blaek or mustly black. (11. (luterprimaryentirely11laelt . . . . 55‘. LAFUHING GL'LL. (1“. Inner halt'ot‘ inner webs 11t‘ti1‘st primary white. 11:. \.\151_\El>(ILLL. I1. 011t1~rprimary 1110stly white.

Tip 01' first primary white . . . . . 5‘1 1’1:.\.\‘1\'11N’s (1111.. 67.'l‘ip11t'fi1~st primarv Mat-k . . . . . 1:11, Box .uultnfs b1 LL.

B. 11111111 \thite sometimes washed with petal-111m. a \\1111_rs white . . . . . . . . . . . . 39. l\'111’.\’ GL‘LL.

1111111111Ls with more ur less l1l.1tl{. [’01. \\ 111}; over 11 W. 11?. Mind toe \'el‘_\' small. without a nail . . . 40. KITTIWAKE. I13. lli111l toe nermal. with a nail . . . 54. RINGJ’JLLJCIJ Gt'L1.. (J. \\'i11g11111_ler11110 . . . . . . . . . . . 151. RUSSSGL'LL. 2. 'l‘ail 111111‘111-11 with l)lllt‘,l{. .-I. \\'i11;_r11\‘t-r13'25. a. l’rimaries1111'1stly white . . . . . . .39. [rum (l:'1.1.(1111.). l1. l‘rimaries l)111k‘l\' 111‘ 11111st1y lilaek . 54. RING-HILLEI) (i:‘L1.11111.), 1f. \\‘i111_r11111l1-r1:3"_"1 a. Mind {111‘ very s111all.\\'itli1-11t a nail . . . 4t". l(1'1“r1w\Kl': (1111.). [1. Mind t11e manual. with a nail. b1. Till" 1s 1'50nrnv1-r . . . . . . EH l..\1'11111.\'1; (l1‘1.1.(1111.). (1. Tan. is under 1‘50. 10. Seenutlaries pearl color. tail square. 1:11. l:1.\‘.\1*.\11n;‘s HULL (1111.1.

1'3. Secundaries mostly whitku tail ruunded. 61. Russ‘s (5111. (1111.).

39. Gavla. alba ( r.unn ).l\'11m* Grit. Ark—Entire plumage pure white; hill yellow. tuet black. lm.#-\‘i111ilar tn ail.. hut the will: and tail