504 Zoological Society. 



Total length, 15 inches ; hill, 1| ; wing, 12 ; tail, 5 ; tarsi, 2 ; mid- 

 dle toe and nail, 2^. 



Procellaria Solandri. Proc. cupite, nucha, hmneris, primuriis 



et caudd saturatl' fvscis ; dorso, alarum caudaque tectricibiis eplum- 



beo-cinereis, plumis fusco marginatis ; facie, corporeque siibtiis 



fuscls, abdomine cinerco lavato. 



Head, back of the neck, shoulders, primaries and tail dark brown ; 



back, wing-coverts and upper tail-coverts slate-grey, each feather 



margined with dark brown ; face and all the under surface broAvn, 



M'ashed with grey on the abdomen ; bill, tarsi and membranes black. 



Total length, 16 inches; bill, 1|; wing, 12; tail, 5| ; tarsi, |- ; 



middle toe and nail, 2|. 



Procellaria leucoptera. Proc. vertice, corpore superiore, alisque 

 e phimbeo nigris ; caudd e plu7nbeo-cinered ; facie, gutture, corpore 

 inferiore, rectricum pogoniis internis ad basitn, Unedque hurnerali 

 albis ; tarsis, et membranis interdigitalibus per dimidium basale e 

 carneo-albis. 

 Crown of the head, all the upper surface and wings dark slaty 

 black; tail slate- grey; greater wing-coverts slightly fringed with 

 white ; face, throat, all the under surface, the base of the inner webs 

 of the primaries and secondaries, and a line along the inner edge of 

 the shoulder, pure white ; bill black ; tarsi and basal half of the inter- 

 digital membrane fleshy white ; remainder of the toes and interdigital 

 membrane black. 



Total length, 13 inches; bill, 1; wing, 8^ ; tail, 4 ; tarsi, 1^ ; 

 middle toe and nail, 1§. 



Aptenodytes undina. Apt. corpore superiore, lateribus, alisque 

 superrie nitidi cccrulescentibus, per plumas singulas lined nigrd 

 longitudinaliQatiore in plumis dorsalibus); corpore inferiore alisque 

 subths et ad marginem, rectricumque pogoniis internis albis. 

 The whole of the upper surface, flanks and u])per surface of the 

 wings glossy light blue, with a narrow stripe of black down the 

 centre of each feather, the black mark being broadest and most con- 

 spicuous on the back ; all the under surface of the body, under side, 

 and the inner margin of the upper side of the wing and inner webs 

 of the tail-feathers silky white ; bill reddish brown beneath, black 

 above ; feet yellowish white. 



Total length, 13^ inches; bill, 1^; tarsi, |. 

 Hab. Van Diemen's Land. 



This is less than Ap. vnnor, to which it is nearly allied. 

 For the fine specimen here described I am indebted to Ronald C. 

 Gunn, Esq., who procured it at Circular Head, "\'^an Diemen's Land. 



April 9. — William Yarrell, Esq., Vice-President, in the Chair. 



A paper by Mr. Sylvanus Hanley was read, containing the follow- 

 ing descriptions of new species of the genus Tellina, chiefly collected 

 by H. Cuming, Esq. in the Philippine Islands and Central America : — 



Tellina Cumingii*. Tel. testa elongato-oblongd, subcequilaterali, 



* In my former papers I have used the terms posterior and anterior in 



