302 KECORD OF SCIENCE FOR 1887 AND 1888. 



For the lower molars the termination e is changed to id in the first 

 four names for the corresponding cusps, thus, Hypocone for the upper, 

 Hypoconid for the lower. The term Upiconid is applied to the postero- 

 internal cusp. 



Osborne's paper (214) in its original form was read before the Geolog- 

 ical section of the Bath meeting of the British Association in Septem- 

 ber, 1888, and also before the National Academy of Sciences, in New 

 Haven, November, 1888. An abstract was published in the American 

 Naturalist (see 213), and 214 is the full paper. The author defines "the 

 stages of Trituberculy as seen in different types" of the mammalian 

 teeth in their order of succession as follows: I. Haploilont type (Cope), 

 not yet discovered. I, A. Protodont tubercular type; example, Droma- 

 therium. II: Triconodont type (Osborne) ; example, Triconodon. III. 

 Tritubercular type (Cope); example, lower molars of Spalacotherium 

 and Asthenodon. 



Osborne (211) gives a review of Mr. Lydekker's arrangement of the 

 Mesozoic mammals. 



E. D.Cope (50) discusses Riitimeyer's classification with some remarks 

 upon the American types found in Switzerland. Mr. Cope (40, 45, 47) 

 adds some new facts regarding the vertebrate fauna of the Puerco se- 

 ries. In the first paper (40) the new species Psittacotheriiini megalodns 

 is described, without figure, on page 409, and the species P. mulUfragum 

 is referred to. In the last paper (47) the author reviews his studies of 

 the Puerco epoch, while in the extended paper (45) the following species 

 and one new genus are described, without illustration : 



Chelydra crassa, p. 306. 



Onychodectes, (gen. nov.), p. 317. O. tisonensis, p. 318. 



Mioclamus bathygnathus, p. 321. 



Mioclwnus pentacus, p. 325. 



Mioclcrnus (jaudriamis, p. 326. 



Mioclcrnus lydekkerianus, p. 328. 



MioclwnusfilhoUanMS, p. 329. 



Mioclwnus floverianus, p. 330. 



Mioclcenus sittelianns, p. 334. 



Mioclwnits tiirfiidunciilus, p. 334. 



Chrincus schlossrrioniis, p. 338. 



Chriacus riielimeyeranus, p. 340 



Chriacus stenops, p. 341. 



Chriacus inversus, p. 342. 



Triisodon biculminatus, p. 343. 



Dissacus vavajoviiis, ]). 344. 



Haploconus cornicidalus, p. 349. 



Feriptychus hrahviisis, p. 354. 



The vertebrate fauna of the Puerco series has reached the number of 

 one hundred and six s])ecies, among which are represented Croeodilia, 

 Testudinata, Khynchoce])halia, Oidiidea, Aves, Marsupialia, Bunotheria, 

 Taxeopoda, aiul Amblypoda. 



H. F. Osborne (212) notes the discovery, by M. Filhols, of the identity 

 of ChaUcotheriuni and Macrotherium. 



