Abstract
Notwithstanding the many additions which within the last few years have been made to our knowledge of the Pliocene Mammalian Fauna, by Mr. Lydekker, in the Quarterly Journal of this Society, in the ‘Geological Magazine,’ and in the British-Museum Catalogues (1885–87), several species new to the British Crags, and others altogether new to science, have come to light during a critical investigation of the Crag Yertebrata, which it has been my official duty to undertake. As it is likely to be some time before the results of this investigation can be published, it is hoped that an account of the new forms will be acceptable to the Fellows of this Society. For several of the specimens here described I am indebted to the kindness of Mr. E. C. Moor, of Great Bealings, Suffolk, who has most courteously placed these and many other fossils at my disposal. Mr. James Reeve, of the Norwich Museum, has likewise been good enough to lend me many specimens, and among them the unique tooth which is now to be named after him. For the opportunity of studying the rostrum of Mesoplodon Floweri * I am under obligation to the genial Curator of the Ipswich Museum, Dr. Taylor. To all these friends of science I tender my best thanks for their kindly assistance. Description of Species. 1. L utra D scubia , Blainville. (P1. XVIII. figs. I a-1 c.) Within the last few years Mr. E. C. Moor, of Great Bealings, has obtained from the nodule-bed of the Red

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