PALEONTOLOGY. 299 



. G. Baiir (12) gives some points upon tlic chissiticatiou ami relations 

 of the Ichtliyopterygia. He concludes that " the Ichthyopterygia were 

 developed from land-living rei>tiles which v^ery much approach the 

 Spheuodontida^ ;" he classifies them in three families, viz : (1) Mixo- 

 sauridai, Baur (including the genus Mixosaurus, Baur) ; {2) Ichthyo- 

 sauridie, Bonaparte (iucludiug the genus Ichthyosaurus. Koeuig, etc.); 

 (3) BaptanodontidiT^, Marsh (including Baptanodou, Marsh). 



F. W. Cragiu (55) describes, without figures, Trinacromerum (gen. 

 nov.) and T. Bentonianum (sp. nov.), pp. 405-407. This species is said 

 to belong to the order Sauropterygia, to resemble the genus Baptano- 

 don, Marsh, and it may be identical generically with Piratosaurus, Leidy. 

 The author promises a fuller paper with illustrations in the -'Bulletin 

 of the Washburn College Laboratory of Natural History, Topeka, 

 Kansas." 



E. D. Cope (52) announces the discovery of the remains of the genus 

 GoniophoVts, and describes a new species under the name of G. Lucasii, 

 p. 1107 (no figure). In the paper (39) on American Triassic Rhyncho- 

 cephalia, he describes, more fully than in the original article, Typo- 

 thorax coccinarUm, Cope, and from the study of new material he con- 

 cludes that the species is allied closely to the genus Mtosaurus of 

 Fraas. In another paper (43), the same author describes the following 

 new species from the Trias of North America : 



Episcoposaiirus horridus, p. 213; the genus of this species is also new aud is con- 

 trasted with Belodon. (No illustrations.) 

 Tanystrophwus TrUHstoni, v.227. (Notigure.) 



Additional characters are described for the following species : 



Eupelon durus, Cope. 

 Typothorax coccinarum, Cope. 

 Belodon buccros, Cope. 

 Belodon scolopax, Cope. 

 Ttinystrophivus longicoUis, Cope. 

 Tanystroplueus Bauri, Cope. 



Henry F. Osborne (204) compares and contrasts the two genera 

 Dromatherium, Emmons, aud Microconodon, Osborne, and finds reason 

 for considering them quite distinct types of animals. The Dromatherium 

 he regards as distinct from any known mammal, recent or fossil, pre- 

 senting some rei)tilian features, while the Microconodon is a more re- 

 cent type and approaches in the form of its teeth some of the Jurassic 

 mammals. The genus Microconodon was described by the author in 

 the Proceedings of the Philadelphia Academy of Natural Science for 

 188G, page 302. It is founded upon the specimen in the collection of 

 the Academy of Natural Science at Philadelphia, which was originally 

 named Dromatherium by Emmons. The type of Dromatherium is D. 

 sylvestrc, Emmons, 1857, the original specinuMi belonging to the museum 

 of Williams College. In this paper both specimens are figured. 



