Reports and Proceedings — British Association. 477 



and in having but one inner tubercle instead of two on the last three 

 premolars. The molar dentition approaches towards Menoclus. The 

 pelvis was more Paheotheroid than Tapiroid. This genus, which is 

 limited to the Eocene, is illustrated by descriptions of four species. 

 Limnoliyus differs from the type last mentioned in having two conical 

 tubercles instead of one on the inner series in the last upper molar. 

 Two species are described. Lambdotlierium is only known from its 

 dentition ; and the author remarks that if the ridges which are 

 rudimented in the molars of Hyracotlierium were developed, and the 

 external cusps of the superior molars flattened externally, the result 

 would be the dentition of Lamudotlierinm. Three species are described. 

 Brief notices follow, without description of species, of the genera 

 contained in the Macraucheniidae, Menodontidge, Palasotheriidas and 

 Equidse. 



The Perissoclactyla in the Eocene rocks of the Western Territories 

 are thus seen to exhibit many and varied types, but the Artiodactyla 

 are scantily developed in the Eocene period. Only two or perhaps 

 three genera of Hogs have come under Professor Cope's notice, and 

 Pantolestes is the only type described. The tarsal characters are in 

 general similar to those of Dicobmie, but this genus differs in having 

 but one inner tubercle to the upper molars and one external tubercle 

 to the upper premolars, and differs from the Anoplotheres in the 

 presence of external digits. Seven species are defined and described. 

 This concludes the account of about 250 species of Eocene Vertebrata, 

 though supplements include descriptions of a few Fishes, Eeptiles, 

 Birds, and Mammals, which were received too late to be comprised 

 in the body of the work. A notice of the Miocene fauna from the 

 "White Eiver and John Day beds must be reserved for another 

 notice, after which it may be convenient to discuss the scientific 

 results of the author's work. H. G. Seeley. 



BEPOE-TS -A-JSTJD IlPIROCIEIEIDIIDTGrS- 



British Association for the Advancement of Science. 

 Fifty-sixth Meeting, Birmingham, 1886. 



Section C. — Geology. 



-Professor T. G. Bonnet, D.Sc., LL.D., F.E.S., F.S.A., F.G.S. 

 Vice-Presidents:- — Professor C. Lapworth, LL.D., F.G.S. ; H. Woodward, 

 LL.D., F.E.S., F.G.S.; Eev. H. W. Crosskey, LL.D.; Sir Julius Von 

 Haast, K.C.M.G., D.Sc, F.E.S. ; Prof. E. Hull, LL.D., F.E.S. ; 

 W. Mathews, M.A., F.G.S. ; Dr. A. E. Selwyn, C.M.G., F.E.S. 

 Secretaries :— W. Jerome Harrison, F.G.S.; J. J. H. Teall, M. A., F.G.S. ; 

 W. Topley, F.G.S. {Recorder) ; W. W. Watts, B.A., F.G.S. 

 Titles of Papers read September 2nd to 8th, 1886. 

 Address by the President. 



Prof. C. Lapworth. — Geology of the Birmingham District. 

 W. J. Harrison. — On the Discovery of Bocks of Cambrian Age at 



Dosthill, in Warwickshire. 

 Prof. C. Lapworth. — The Cambrian Bocks of the Midlands. 

 W. U. Waller. — On the Petrography of the Volcanic and associated 

 Bocks of Nuneaton. 



