26(J RECORD OF SCIENCE FOR 1886. 



Nicholson, U. Alleyne, aud li. Etheridge, jun. {See Steinmann.) 

 Nicholson, H. Alleyne, and A. H. Ford. {See Steiiimauii.) 

 NoETLiNG. E. D. Cope: On the structure of the skull in the Elasmo- 

 braucli genus Didyuiodus. Proceedings of the American Philosoph- 

 ical Society, 1884; Paleoutolog. Bulletin No. 38. (Neu. Jahrb. Min.,' 

 Geol. and Pal., 1886. Band, i, pp. 114, 115. Stuttgart.) 



Abstract. 



NoETLiNG. 11. S.Williams: Notice of a new Limuloid Crustacean 

 from the Devonian. American Journal of Science and Arts, 1885. 

 (Neu. Jahrb. Min., Geol., and Pal., 1886. Band, i, p. 344. Stuttgart.) 



Abstract. 



NoETLiNG. n. S. Williams: New Crinoids from the Rocks of tjie Che- 

 mung Period (Upper Devonian) of New York State. Proc. Acad. 

 Nat. Sci.,Philad.,1882. (Neu. Jahrb. Min.,Geol., and Pal., 1886. Band. 

 I, p. 36U. Stuttgart.) 

 Abstract. 



Owen, RiuHArd. On a New Perissodactyle Ungulata from Wyoming. 

 (Geol. Mag., new ser., Decade iii, vol. in, p. 140, March, 1886. 

 London.) 



lu the Geological Magazine for February, 1886, it is stated, p. 50, that no Peris- 

 sodactyle mammal was known to possess tubercular teeth. Professor Cope 

 does not supply the characters to which his term "tubercular" is applica- 

 ble. Sir Richard then says that he ligureil tubercular molars of I'Jiolophus 

 from the Eocene in his Paleontology ('2d ed., 1861), and that an earlier ex- 

 amjile is (uund in the genus Hjiracotherlinu, described and figured in "Brit- 

 ish Fossil Manmials and Birds," 8vo., 184(5, p. 422, cut 166 ; also from " Lon- 

 don Clay."' He states that his estimates of the claims of Elephants and 

 Mastodons to rank as an " Order" rusts upon the mnltilamellato structure, 

 size, and succession of their "grinders," subordinate to which dental char- 

 acter may be cited a vertebral one, necessitating their special instrument, 

 the proboscis. 



Osborne, Henry F. A new Mammal from the American Triassic. 

 (Science, vol. viii. No. 201, p. 540, and fig., December, 1886. New 

 York.) 



Describes Microconodon lenuirosfria in the collection of the Philadelphia Acad- 

 emy of Natural Sciences, as on comparison he liuds it to belong to (juite a 

 difterent genus from Droniatherium sylvestre Emmons, to which it had been 

 referred. 



Osborne, Henry F. Observations upon the Upper Triassic Mam- 

 mals, Droniatherium and Microconodon. (Proc. Acad. Nat. Sci., vol. 

 , pp. 359-363, figs. 1-3, December, 1886. Philadelphia.) 



Describes the new genus and species Microconodon tenuirostris. This genus is 

 founded upon the specimen in the collection of the Academy of Natural 

 Sciences of Philadelphia, which was described by Emmons as Dromathe- 

 rium. He also re-describes Dromatherium sylvestre Emmons. There are 

 some portions of jaws described by Emmons from the Upper Triassic (Chat- 

 ham coal-tields) of North Carolina. 



