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PROCEEDINGS OF SCIENTIFIC SOCIETIES. 



Zoological Society of London. 



June 20, 1882. — Dr. A. Gunther, F.R.S., Vice-President, in the chair. 



The Secretary read a report ou the additions that had been made to the 

 Society's Menagerie during the month of May, 1882, and called special 

 attention to the following recent acquisitions : — four Pigmy Hogs, Porcula 

 salvania; a Mediterranean Seal, Monachus alblventer ; two male Argus 

 Pheasants, Argus giganteus ; a Koala, Phascolarctus cinereus ; a Jackass 

 Penguin, Spheniscus magellanicus ; and a fine pair of the Great Ant-eaters, 

 Myrmeeophaga jubata. 



The Secretary exhibited a series of the diurnal and nocturnal Lepi- 

 dopterous insects bred in the Insect House in the Gardens during the 

 present season, and called attention to several specimens of clear-winged 

 Moths (Sesiida), a group of insects which had not before been exhibited in 

 the Insect House. The cocoon of Cricula trifenestrata, together with the 

 imago, was also exhibited. 



Mr. W. A. Forbes made remarks on the presence of a rudimentary 

 hallux in certain birds— the Albatrosses and two genera of Woodpeckers 

 (Tiga and Picoides), commonly described as being three-toed, and exhibited 

 preparations showing its condition in the birds in question. 



Prof. Owen read the twenty-fifth of his series of memoirs on the 

 Dinornis. The present communication gives a description of the head and 

 feet, with their dried integuments, of an individual of a species proposed 

 to be called Dinornis didina. These specimens had been obtained by 

 Mr. H. L. Squires, at Queenstown, South Island of New Zealand, and 

 being parts of one individual tended to elucidate in an unlooked-for degree 

 the external characters of the Moa. 



A second communication from Prof. Owen contained some observations 

 ou Trichina spiralis. 



Prof. E. Ray Lankester gave a description of the valves of the heart of 

 Ornithorhynchus paradoxus, and compared them with those of man and the 

 rabbit. Prof. Lankester also made some observations on the fossa ovalis of 

 the Monotremes. 



Prof. Huxley read a description of the respiratory organs of Apteryx, 

 which he showed did not differ fundamentally from the Avian type, and 

 pointed out that neither of the structures that had been termed diaphragms 

 in the Apteryx was really in correspondence with the Mammalian diaphragm. 



Mr. W. A. Forbes read the sixth of his contributions to the anatomy of 

 Passerine birds. In the present communication the author showed that 

 Xenicus and Acanthisitta, hitherto considered to be allied to Certhia, Sitta, 



