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Show 1891.] DR. C. J. FORSYTH MAJOR ON FOSSIL GIRAFFIDJE. 325 allied horned forms (Sivatherium, Hydaspitherium, Bramatherium) then known. The Sivatherium having somewhat different molars, whilst the teeth of Hydaspitherium, according to Lydekker, are not to be distinguished from those of the so-called Helladotherium from the Siwaliks, whilst, besides, the configuration of the skull approaches more to Hydaspitherium, I think that we have before us the female skull of a genus of which the male form cannot have differed much from the form presented by Hydaspitherium megacephalum, Lyd. Fig. 4. Sivatherium giganteum (female). Upper view (A) and side view (B) of skull, one-sixth nat. size (after Falconer and Gautley). Siwalik Hills, India. I wish to be far less positive as to the sex of the Helladotherium skull from Pikermi. Having before us in the Pikermi fossil a geologically older form, the development of horn-like appendages even in the male may not have advanced beyond the stage shown in the specimen figured by Gaudry. At any rate we cannot be surprised at the general likeness of the |