Miscellaneous. 75 to detect it within the perfected Purkinjean corpuscle, not only corresponding to the nucleus of the remaining unossified cartilage-cells in granular structure, but also in its measurements. After the Purkinjean corpuscle has been formed a short time, the nucleus dis-solves away or disappears. The newly-formed Purkinjean corpuscle is about the same size as the remaining unossified cartilage-cells, as indicated in the list of measurements appended to these notes. Size of cell of temporary cartilage from the unossified os frontis of a human embryo, yg^^^ of an inch ; nucleus of ditto, 3^2 J ^^ ^^ ^^^^ ^ nucleolus, -^^-^-^ of an inch ; Purkinjean corpuscle, j-^-qj of an inch ; nucleus within the same, ^^j^jq of an inch. — Proceedings of the Aca-demy of Natural Sciences of Philadelphia, vol. iv. p. 116. MODE OF PROGRESSION WITH ANIMALS. It has been noticed by nearly all naturalists, as one of the pecu-liarities of the Giraffe, that it moves the two legs on the same side of it together ; I have however noticed that most other animals walk in that manner, although few run so ; among others I will mention the following as verifying my observations : — the Camel, the Lion, the Tiger, and Leopard, and all animals of the Felidse, the Wolf, and Hyaena, and all the canine race. Sometimes I have observed the same peculiarity in the Horse and Ass, though rarely ; the Camel runs so ; the other animals which I have mentioned, I have never observed to walk in the usual manner. W. A. Pike. Descriptions of new species of the genera Nyctale, Brehm., and Syco-bius, Vieill. By John Cassin. Genus Nyctale, Brehm. Handb. Nat. Vog. Deuts. p. 111. Nyctale Harrisii, nobis. Front, face, nuchal collar, and under surface of the body yellowish white, or buff colour. Spot between the eye and the bill, and a broad occipital band, black, the latter covering the greater part of the hind head. Feathers covering the ear black. Throat with a few black feathers, and many of the feathers of the ruff on the front neck conspicuously tipped with black. Upper surface of the back and wings deep reddish brown ; wing-coverts with conspicuous round spots of white ; all the quill-feathers also irregularly marked and spotted with white on the edges of both webs ; scapulars largely edged with white and buff. Upper tail-coverts brown, spotted with white. Tail black, with about three pairs of rounded white spots on every feather. Tarsi thickly feathered to the toes, and with the whole under surface of the body buff colour. Total length of skin, from tip of bill to end of tail, about 7| in. ; wing, 5| ; tail, 2f . Hab. South America ? The specimen now described was obtained from Mr. J. G. Bell,
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