collected on the Red Sea. 
349 
108. PoDICEPS AURITUS. 
In December near Suez. 
109. Thalassidroma, sp. 
Single individuals and whole flocks seen at the end of 
September, near Bab-el-Mandeb. 
110. Puffinus, sp. 
Some specimens observed on the coast of Somali; dark above 
and white below; size of a turtle. They passed the ship in a 
very rapid and serpent-like flight. 
111. Rhynchops flavirostris. 
Small flocks in J uly and August on the Red Sea, between 
20° N.L. and 14° N. Island of Dahalak, 
112. Larus ftjscus. 
Through the whole year in pairs on the Red Sea, and on the 
Gulf of Aden. Abu Daghaba , Arab. 
113. Larus leucopmus, Licht.; Bonap. Consp. vol. ii. 
p. 219. 
Seen near Ras Belul; more frequent on the Somali coast and 
in the Gulf of Aden. Mas adult, (hyeme) : Length from the top 
of the beak to the end of wings 2' 1", wing 16" 5'". Naked space 
round the eye, deep-red; iris, pale-brown, with many minute 
black spots; rictus orange-red; upper mandible pale ochre- 
yellow, before the point orange; under mandible pale greenish- 
yellow, a spot before the point deep aurora-red; feet very pale 
ochre-yellow, membranes somewhat darker. Fcem . jun. (hyeme). 
Length of wing, 16". Naked space about the eye and iris pale- 
brownish, the latter also minutely spotted ; beak dirty yellowish- 
carneous; under mandible a little more plumbeous, a large black 
band before the top ; feet pale-bluish, membranes carneous. 
114. Larus leucophthalmus. 
Very scarce north of the tropic, but very frequent more to the 
south. Somali coast. Adjameh , Arab. Long. 16" 6"' (ad ap. 
caud.), 18" 2"' (ad ap. ah), tars. 1" 9 ". Naked space round eye 
and beak coral-red, with the point blackish ; iris dark-brown ; 
