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Show 1875.] MR. G. E. DOBSON ON THE GENUS CHALINOLOBUS. 381 Mr. Edwin Ward, F.Z.S., exhibited a pair of Hippopotamus teeth, and made the following remarks :- " The Hippopotamus teeth sent for exhibition this evening are throught to be probably the largest that have as yet been obtained. The dimensions and weight of these two lower canine teeth are as follows:-length of each tooth from end to end round outer curve 30 and 31 inches respectively ; circumference of each 9 and 9$ inches respectively. Total weight of the pair 15 lbs. " These specimens were obtained at St. Lucia Bay, S. Africa, in 1873, by the Hon. Charles Ellis, to whose kindness I a m indebted for being enabled to show them to the Meeting." The following papers were read:- 1. On the Genus Chalinolobus, with descriptions of new or little-known Species. By G. E . D O B S O N , M.A., M.B., F.L.S., &c. [Received April 23, 1875.] The genus Chalinolobus was formed by Dr. Peters for the reception of Vespertilio tuberculatus from N e w Zealand, discovered by Forster about J 773, and described in his MSS., which were not published till 1844*. This species was redescribed by Mr. R. F. Tomes in 1857*f fts Scotophilus tuberculatus; but, although his description occupies three pages, it is doubtful whether it would be possible to recognize the species from it; for some of the most important characters, as the lobes of the lower lip and the large post-calcaneal lobes, have not been noticed, and the dentition has been incorrectly described. While examining some stuffed specimens and skins in the British- Museum collection from South Australia and Tasmania, which had been labelled " Miniopterus australis" and "Scotophilus morio, Gray," corresponding to the same names in the ** List of Mammalia in the British Museum, 1843,' I observed that their dentition corresponded in all respects with this species from N e w Zealand; and repeated examinations and careful measurements have shown that they differ in no respect from it. This is especially interesting; for Chalinolobus tuberculatus has hitherto been reported from N e w Zealand only, and was believed to be peculiar to that island. The occurrence of this species in Tasmania and South Australia, however, is not very surprising; for New Zealand is not more distant from Tasmania than the Azores from the coast of Portugal, and Vesperugo leisleri of Europe is certainly also found in the Azores. The discovery of Chalinolobus tuberculatus in these dried specimens led m e to suspect that other species from Australia and Tasmania described from* skins might belong to the same group also; * ' Descriptiones animalium in itinere ad maris australis terras per annos 1772-74,' & c, p. 62 (1844), ed. Lichtenstein. t P.Z.S. 1857, pp. 135-138. |