194 Miscellaneous. 



In his preface and elsewhere Prof. Nicholson objects to the 

 modern school of embryological systematists, and, we think, with 

 reason. That embryological facts may frequently serve as guides 

 in classification, nay, that a classification which is in contradiction 

 to a broad embrj-ology should be regarded with distrust, we are 

 quite ready to admit ; but we must know much more about the 

 embryogeny of animals before we can accept the views of those 

 who hold that their interpretation of the earliest stages of develop- 

 ment is to override all indications derived from the study of the 

 adult animals. 



This edition contains a considerable number of new illustrations, 

 which will materially increase its usefulness as a student's manual. 

 An entirely new feature is the introduction of Bibliographical lists 

 indicating the principal works of reference to be consulted in search 

 of further information upon the different classes of animals. These 

 lists might easily be improved both by additions and omissions ; but 

 as they are they will be found very serviceable. 



MISCELLANEOUS. 



On a jieif Ojpisthocoelous Dinosaur. By Dr. E. D. Cope. 



I HAVE recently received from the Dakota beds of Canyon city, 

 Colorado, a number of bones of a new and remarkable extinct 

 reptile allied to Camarasannis {■=Titanosaurus and Atlantosaunis , 

 Marsh) and Streptosponchjlus. The dorsal vertebrae are strongly 

 opisthocoelous, and are without lateral fossa or foramen of the 

 centrum. The arch is freely articulated with the latter, and is 

 not much elevated, and possesses no hyposphen. The neural spine 

 is transverse ; the diapophysis is supported on narrow buttresses, 

 and the neural arches generally lightened by fossae as in the two 

 genera named. A strong parapophysial tubercle near the anterior 

 convexity receives the head of the rib. Each zygapophysis of one 

 side is separated from that of the other by a deep concavity. The 

 genus so characterized may be called Epanterias, and the species E. 

 ample.vus. The latter has a rather low and wide dorsal neural 

 arch with small fore and aft diameter, and with a neural spine 

 divided into three obtuse apices. There are three fossae at the base 

 of the diapophyses, the anterior one vertical, and a very deep one 

 between the posterior zygapophyses. The cup of the centrum 

 embraces the baU extensively ; and the neurapophysis overlaps the 

 side of the centrum behind. Length of centrum '115 m. ; diameters 

 behind, transverse '120, vertical -108. Elevation of neural arch 

 •290 ; width of neural spine -083, of both diapophyses -400. This 

 saurian was much smaller than the Camarasaurus supremus, and, 

 perhaps, equal to the Hadrosaurus FoulTcei. It may be associated 

 with the former in the Camarasauridce. With AmpMccelias is 

 probably in like manner to be arranged Tichosteus ; while the car- 

 nivorous form HypsirhopTius represents a third type. — American 

 Naturalist for June 1878. 



