298 RECORD OP SCIENCE FOR 1887 AND 1888. 



gives the names of the following new s[)ecies and genus : Gladodus Kep- 

 leri, ])i>. 178,179; Actmojihorus {'^ei\. nov.) p. 171) ; A. ClarJcii, p. Hi) • 

 Dinichthysenrtm, p. 179 ; D. fubercHlatus, p. 179. In the paper (197) a 

 new species is briefly noticed under the name Rhizodus ariceps, p. 165, 

 discovered by William McAdams in the St. Louis limestone at Alton, 

 Illinois. 



A paper was read by J. F. Whiteaves (293) in May, 1888, before the 

 Royal Society of Canada, entitled " Illustrations of the Fossil Fishes of 

 the Devonian rocks of Canada." (If this is pnblished, a copy has not 

 yet reached me. March 30, 1889.) 



Edward D. Cope (41), in connection with a brief notice of the Part on 

 Fishes of Zittel's Manual of Paleontology, takes occasion to give a 

 synopsis of his own views on the subject of the classification of the low- 

 est vertebrata, in anticipation, as he informs the reader, of a fuller 

 memoir with illustrations. 



J. W. Hulke (118) discusses the characters of Ornithopsis, H. G. See- 

 ley, and Omosaicrus, R. Owen, pointing out the propriety of following 

 the classification of Professor Marsh, and places Ornithopsis in the 

 group Sauropoda, and Omosaurus in the group Stegosauria. He 

 questions whether the specimens in the Leeds collection called Omo- 

 saurus should not with justice be referred to the genus IStegosaurus, 

 Marsh. 



R. Lj'dekker (153), in an article in the Geological Magazine, makes 

 some corrections in his Catalogue of Fossil Reptilia, suggested by con- 

 versations with O. C. Marsh during a visit to the Dinosaurian and other 

 collections in the British Museum. 



O. C. Marsh (164) describes one new genus and five new species of 

 Dinosaurs from the Potomac formation in Prince George's County, 

 Maryland : 



Pleurocoelus nanus, gen. et sp. nov., p. 90-92, f. 1-6. 



Pleurocu'lus altus,sp. uov.,p. 92. 



Prieonodon crasmis, geu. et Hp. nov., p. 93, f. 7-9. 



Allosaiirus viedins, sp. nov., p. 93. 



Coelurus gracilis, sp. nov., p. 94. 



The same author (162, 163) describes the principal characteristics of 

 the skull and dermal armor of IStegosaurus, illustrating them by numer- 

 ous figures. 



The paper by E. D. Cope (53) is a short notice of the paper just men- 

 tioned. E. D. Cope (38) discusses the characters of the Dinosaurian 

 genus Gcelurus of Marsh. He regards the genus as Dinosaurian, allied 

 to Megadactylus, Hitchcock, and describes the following new species: 

 Coelurus longicolUs, p. 368, and Coelurus Bauri, p. 368. 



H. G. Seeley (234) discusses the characters of a vertebrate from the 

 Wealden Beds of the Isle of Wight, called Thccospondylus Daviesij 

 Seeley, and compares it with Coelurus frag His of Marsh. 



