810 THE ZOOLOGIST. 
other birds. Probably not a few of the various alleged species are identical. 
Be that as it may, the worms found by Messrs. Langton, Bevington, and 
myself, are evidently referable to the commonest known form. Falcons, 
Hawks, and Owls are equally liable to harbour Filaria attenuata, which 
likewise infests the Crows, Nutcrackers, Starlings, and many other 
passerine species. To be more precise, this Entozoon has heen obtained 
from six different species of Corvus, and it has likewise been found in the 
genera Garrulus, Pica, Pyrrhocorax, Nucifraga, Sturnus, and Cassicus. 
To determine the source of this and other Filaria infesting birds remains a 
problem for future investigations to solve. We possess, however, some 
general knowlodge of the habits of these worms, and from the recent 
observations of Sonsino, Manson, and Lewis respecting the Micro-Filariz of 
Corvus splendens there can be little doubt that all the Filaria are migratory 
in habits, requiring a change of hosts. In Pica caudata the embryos of 
this species were found in the blood. The subject is very complicated; but 
in this connection permit me to call especial attention to the remarkable 
finds of Dr. Manson in China. Hematozoa, and sometimes the parent 
Filaria, were found by Manson in Pica media, Gracupica nigricollis, Corvus 
torquatus, and Goura coronata. A curious pathological appearance is 
presented by the heart of the Chinese Magpie stuffed with specimens of 
Filaria pice-medie (Mans. & Cobb.), but it is not more remarkable than the 
similar appearances that are to be found in many other vertebrates. 
Further particulars on this subject will be found in the ‘Journal of the 
Quekett Microscopical Club’ for August, 1880."—'T. Spencer CoBBOLD. 
PROCEEDINGS OF SCIENTIFIC SOCIETIES. 
Linnean Socrety or Lonpon. 
May 5, 1881.—Artuur Grors, Vice-President, in the chair. 
Prof. Eichler, Director of the Botanic Gardens, Berlin, and author of 
several important botanical contributions, was elected a Foreign Member. 
Mr. GC. Stewart exhibited and described an ovum of Helia hemastoma, 
remarkable for its great size as compared with that of the animal. The 
generative organs are also peculiar. 
Mr. George Busk gave an abstract of a “ Descriptive Catalogue of the 
Species of Cellepora collected on the ‘Challenger’ Expedition,” in which 
some thirty-one species of this Polyzoan genus are referred to. Of these the 
North-Atlantic yields three from depths ranging from 51 to 450 fathoms. 
The South Atlantic furnishes five species from 500 to 600 fathoms. Of seven 
species from the immediate neighbourhood of Kerguelen Land (or so-called 
South Indian Region) three were got from depths ranging from 20 to 150 
