36 THE ZOOLOGIST. 
Dr. Francis Day gave a summary of his third and concluding paper, 
« On the Geographical Distribution of Indian Freshwater Fishes,” in this 
contribution dealing with the families Scombresocide, Cyprinodontide, 
Cyprinida, Notopteride and Symbranchide. Among the eighty-seven genera 
two only are African, thirty-two extend to the Malay Archipelago, and 
twelve are common to Africa and Malaya. Of three hundred and sixty-nine 
species two are African, twenty-seven Malayan, and two common to both 
regions. In short, the Indian freshwater fish affinities preponderate to 
those of the Indo-Chinese and Malayan subregions; thus supporting 
Mr. Alfred Wallace’s opinions, and in opposition to the views held by 
Mr. Blanford, who gives greater weight to African relationships, at least so 
far as mammals are concerned. Dr. Day, moreover, believes that the Indian 
freshwater fishes owe their derivation to three subordinate separate faunas :— 
(1) That belonging to the Ghauts, Ceylon, the Himalayas, and the Malay 
Archipelago, wherein may be distinguished two fish races, a Palearctic and 
a Malayan. (2) A fish fauna of the plains west of the Indus, with an 
African element in it. (3) That spread over the plains east of the Indus, 
and by far the largest, which appears to have a Burmese connection. 
The abstract was read of a second contribution, ‘On the Mollusca of 
the ‘ Challenger’ Expedition,” by the Rev. R. Boog Watson. Of the four 
genera of Trochide, that of Sequinzia has two new species, and other 
information is given; Basillissa is a new genus, whose labial and basal 
sinus connect it with Sequinzia, while both genera present Pleurotomaria 
features; Gaza, also a new genus, is utterly distinct from anything known 
in the family, in which a reverted thickened lip is an entire anomaly; and 
the third new genus, Bembia, presents the novel feature of an epidermis.— 
J. Murie. 
ZooLoaicaL Society or Lonpon. 
November 19, 1878.—A. Grote, Esq., Vice-President, in the chair. 
Mr. Sclater exhibited and made remarks on an adult specimen, in full 
plumage, of the Black-throated Stonechat, Sawicola stapazina, which had 
been obtained in Lancashire, and had been sent for exhibition by Mr. R. 
Davenport. The species had not been previously recorded as occurring in 
the British Isles, and was an interesting addition to the list of “ Accidental 
Visitors.” 
The Secretary read two letters he had received from Dr. A. B. Meyer 
and Mr. A. D. Bartlett in reference to the communication read at the last 
meeting from Mr. Everett respecting the supposed existence of the Anoa 
(Anoa depressicornis) in the Philippines. 
Professor Owen read a memoir on the relative positions to their 
constrictors of the chambered shells of Cephalopods. 
