132 Bedews —Nicholson and Lydekker's Palceontology. 



drawn, and the old erroneous theoretical restoration of the mandible 

 of Thylacoleo is once more repeated, notwithstanding Sir Richard 

 Owen's description of the actual fossil five or six years ago. In the 

 Phalangerida?, the premolar slopes outwards, not inwards as stated 

 (p. 1286) ; and as regards Bradypns didactylus among the Sloths 

 (p. 1300), we would remark that it is identical with Choloepus 

 didactylus, having two toes on the fore foot and three on the hind 

 foot. A new figure of Scelidotherium by Prof. Capellini is added, 

 from the Bologna Report of the International Geological Congress ; 

 and the extinct European genera, Macrotherium and Ancylotherium, 

 are removed from the Edentates to the primitive Ungulates, adopting 

 the recent determinations of Dr. Filhol. The name Nothrotherium is 

 substituted for the pre-occupied Ccelodon (p. 1299) : and the recent 

 discovery of a Pangolin (Palceomanis) in the Isle of Samos is recorded. 

 The Cetacea and Sirenia are fully treated, and the very long section 

 on the Ungulata is profusely illustrated. The well-known evidences 

 of evolution in the various types are pointed out, and several original 

 observations are recorded. The resemblance between the skull of 

 the newly-described Samotherium and that of the antelopoid genus, 

 Palceotragus, is remarked upon ; and the so-called Macrotherium 

 sivalense, from the Siwalik formation, is placed in the Chalicotkeriidae, 

 like its European representatives determined by Dr. Filhol. Prof. 

 Marsh's new restoration of Titanotherium (or Brontops) robustum 

 and Prof. Cope's figure of Phenacodus primcevus are added ; and 

 the so-called Dinoceras and Tinoceras, from the Bridger Eocene of 

 the United States, are described as identical with Uintatherium. For 

 various reasons, however, Prof. Marsh does not adopt this earlier 

 name, and the quotation on p. 1390, from that author, should have 

 been precise. The enumeration of the extinct Rodentia is elaborate, 

 though with few -figures; and then follow the Carnivora, occupying 

 thirty pages, illustrated by nearly forty woodcuts. Among the 

 latter are valuable lateral views of the detached dentition of the Seal, 

 Dog, and Bear ; and the family Ursidse, as in the author's previous 

 publications, is defined as including both Dogs and Bears. 



The last chapter is devoted to the Insectivora, Cheiroptera, and 

 Primates ; the former two orders being illustrated by figures chiefly 

 of existing types, while some interesting figures recently published by 

 Prof. Cope are incorporated in the account of the Lemuroid Primates. 

 Nearly seventy works and memoirs are enumerated in the literature 

 of the Mammalia, and we would add one more from which infor- 

 mation has been obtained for the text, namely, Mr. E. T. Newton's 

 Memoir on the Vertebrata of the Forest Bed. 



The volume concludes with a section on Paleobotany, giving " an 

 extremely brief and entirely general sketch of the past distribution 

 and succession of the chief types of plant-life." This part of the 

 work has been compiled by both the authors jointly, and numerous 

 figures not given in the earlier editions are added. The bibliography 

 is fully detailed, but Mr. Kidston's memoir on the Radstock Coal- 

 plants, we observe, has been ascribed to another author. 



In an appendix, several publications that have appeared during 



