266 RECORD OF SCIENCE FOR 1886. 



Nicholson, H. Alleyne, aud R. Etheridge, jun. {See Steinmann.) 

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

 NOETLING. E. T>. Cope: On the structure of the skull in the Elasmo- 

 brancli genus Didyniodus. Proceedings of the American Philosopli- 

 ical Society, 1884; Paleontolog. Bulletin No. 38. (Neu. Jabrb. Min., 

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

 Ahstriict. 



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

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

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

 Abstract. 



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

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

 Nat. Sci., Pbilad., 1882. (Neu. Jabrb. Min.,Geol., and Pal., 1886. Band. 

 I, p. 'SGih Stuttgart.) 

 Abstract. 



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

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

 London.) 



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

 sodactyle luanuual was known to possess tubercular teeth. Professor Cope 

 does uot supply the characters to which his terra "tubercular" is applica- 

 ble. Sir Richard then says that he figuretl tubercular molars of riiolophus 

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

 ample is found in the genus Ilfiraculherium, described and figui'ed in " Brit- 

 ish Fossil Mannuals and Birds," 8vo., 1846, p. 422, cut 166 ; also from " Lon- 

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

 Mastodons to rank as an " Order" rests upon the niultilamellate structure, 

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

 acter may be cited a vertebral oue, 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 Mlcroconodon lenuirostris in the collection of the Philadelphia Acad- 

 emy of Natural Sciences, as on comparison he tiuds it to belong to quite a 

 different genus from Dromafheriiim. sylve-stre Emmons, to which it had been 

 referred. 



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

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

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



Describes the new genus and species Microconodon lenuirostris. 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 si/lvestre Emmons. There are 

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

 ham coal-fields) of North Carolina. 



