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Show • 1901.] ON EXTINCT REPTILES FROM PATAGONIA. 169 specimen of one of the large Bird-catching Spiders (Avicularia). This Spider did well up to the end of August last, when it died soon after casting its "skin." This skin, which is perfect, I exhibit. The Spider itself was so soft when it died that I could not set it. The process of casting the " skin" amongst the large Spiders is a very trying one, and most of the specimens we have had have died during the process or soon after. _ On behalf of Captain Stanley Flower, F.Z.S., Mr. Sclater exhibited photographs of three fine animals living in the Zoological Garden at Ghizeh, taken by Captain F. H. Mackenzie, of the Army Pay Department. Mr. Sclater remarked that the photo of the young female Giraffe (Giraffa camelopardalis typica) and that of the young male White Oryx (Oryx leucoryx) represented the specimens brought by Captain Flower from the Soudan last year; the photo of the fine adult male Ostrich was of special iuterest as showing the vocal sac (text-fig. 48, p. 168) as extended in the breeding-season. On behalf of Dr Einar Lonnberg, two photographs of the largest skull of the East Greenland Musk-ox obtained during Mr. G. Kolthoffs expedition were exhibited. The dimensions of the specimen were :- Basal length 460 millim. Greatest orbital length 280 „ Greatest occipital width 187 „ Length of boss of each horn 205 „ The following papers were read :- 1. On some Extinct Reptiles from Patagonia, of the Genera Miolania, Dinilysia, and Genyodectes. By A. S M I TH WOODWARD, LL.D., F.R.S., F.Z.S. [Received March 1, 1901.] (Plates XV.-XX.1) To the north of Patagonia there is a widely distributed formation of red sandstone, supposed to be of Cretaceous age, containing important remains of extinct Reptiles iu association with equally remarkable fragments of extinct Mammals. Many of these fossils have been skilfully collected by Mr. Santiago Roth for the La Plata Museum ; while some of them, belonging to gio-antic Dinosaurs and small Mesosuchian Crocodiles, have already been the subject of illustrated monographs a. A few of the most 1 For an explanation of the Plates, see p. 183. 2 R. Lydekker, "The Dinosaurs of Patagonia,'' Auales Mus. La Plata- Paleont. Argentina, no. ii. (1893). A. Smith Woodward, " O n two Mesozoic Crocodilians, Notosuchus (genus novum) and Cynodontosuchus (genus novum), from the Red Sandstones of the Territory of Neuquen," ibid. no. iv. (1896). |