Douglas A. Bell 1985 Catalogue Alcatraz Island San Francisco Bay, San Francisco Co., Calif. May 18, 1985 011 Larus occidentalis Egg #1 from nest 29, Parade Grounds. 88.75 gms 70.63 x 49.06 mm. Shell & egg-white saved. Small keim (<1mm) TO MV2 X-CHNG egg 012 Larus occidentalis Egg #2 (?) from nest 29, Parade Grounds 93.6 gms 73.79 x 49.48 mm. Shell, yolk & egg-white saved. Small keim (<1mm) TO MV2 X-CHNG egg 013 Larus occidentalis Egg #3 (?) from nest 29, Parade Grounds 86.6 gms 68.56 x 48.86 mm. Shell, yolk and egg-white saved. Small keim (<1mm) May 20, 1985 172380 014 ♂ Larus occidentalis Ad. Plumage. Mated to 015. Nest #117-Parade Grounds 1,050 gms Both testes large ; 1.6 x 1.3 cm (centimeters). Eyes: pearl-mustard, Eyering: deep yellow, Feet & legs: fleshy pink, Bill: deep yellow Nest #117- Parade Grounds 172381 015 ♀ Larus occidentalis Ad. Plumage Mated to 014. Egg, ripe and 1,060 gms Egg in oviduct; wt. 95.45 gms 71.12 x 50.3 mm with all shells in oviduct. Eyes: pearl-mustard, Eyering: deep yellow, Feet & legs: fleshy pink; Bill: deep yellow. >50 ova (yellow) in ovary. Most <2mm dia. 2ova 7x7.5 mm; 1ovum 7x8 mm, 2ova 7x6.5, 10vum 7x6.0 mm, 1ovum 7.5x6.0 mm 3ova 4 x 3.5 mm. Rest <2mm dia. TO MV2 X-CHNG egg 016 Larus occidentalis Egg #1 from Nest #117-Parade Grounds 100.12 gms 72.93 x 51.09 mm. Shell, yolk & egg-white saved. Small keim. TO MV2 X-CHNG egg 017 Larus occidentalis Egg #2 from Nest #117-Parade Grounds. 100.12 gms 69.5 x 52.65 mm. Shell, yolk & egg-white saved. Small keim. Clatsop Co., Oregon East Sand Island, Mouth of Columbia River, Oregon (approachable by boat from Chinook, WA). In Baker Bay, WA. 172817 June 4, 1985 h . 018 ♂ Larus occidentalis x. Ad. Plumage. Trapped on nest. Wt. 1150 gms glaucrescens Nest located in natural grass, drift wood area in middle of island (tertiary-use area). Iris-pearl grey/yellow; Eyering-yellow; Bill- yellow. Legs & feet - flesh (sl. pink). Testes: L 16 x 10x10 mm R 11x9 x 8.5 mm. Liver - Left lobe: 6.8 x 4cm, 19 gms; Right Lobe -6x3.5 cm, wt 16 gms