18S-.] 221 fCope 



absence of optic foramina, and the probaljility that the Diadectidte were 

 blind and subterranean in their liabits becomes great. 



5. Belodon scolopax Cope. American Naturalist, 1881, p. 923. 



This species is represented by a snout, which includes the anterior bor- 

 der of the nares ; it is broken into five pieces, 'which should be connected 

 with intermediate fragments, which are lost. This muzzle is a little 

 shorter than that of B. pUeningeri, but is a good deal more slender, the 

 distal part having only half the diameter of the latter. Besides this char- 

 acter, it differs from that of B. iHieningeri in three others. The extremity 

 of the muzzle is not so much decurved. All the alveohe have a more 

 lateral exposure, and the lateral ridges of the palate are thus more dis- 

 tinctly seen from the side. The two teeth on the extremity of the muzzle 

 are closely crowded together, and their large alveohv are scarcely distinct. 



The surface of the muzzle is distantly and weakly grooved and punc- 

 tate. The anterior alveolte are round, the posterior ones oval. Diam- 

 eters, an inch anterior to nares : transverse, .0230 ; vertical, .023o. Diam- 

 eters three inches from extremity : transverse, .019 ; vertical, .0145. 



G. Tanystkoph.eds longicollis Cope. Calurus longicollis Cope. 

 American Naturalist, April, 1887 (pub. May 4th), p. 368. 



Numerous fragments of this genus are in my collection from the 

 Triassic beds of New Mexico. The vertebnie resemble in various essential 

 characters those which are preserved and described by I\Iarsh as belong- 

 ing to the species of his genus Coelurus, and I therefore referred the 

 present species to that genus, as above cited. It is now clear to me that 

 the Triassic species must be distinguished from Ccelurus. Prof. Marsh 

 states that the anterior cervical vertebra of the latter have the anterior 

 articular surfaces convex, while the posterior are concave. In the Triassic 

 species the third cervical is concave at both extremities, thus resembling 

 the posterior centra. In searching for a name for the Triassic genus, I 

 find that the Tanystrophieus of Von Meyer will probably include the 

 American species iu question. This genus was established on caudal 

 vertebroe which nearly resemble those of the New Mexican species. For 

 the present then I will retain for them the generic name first given to the 

 Tanystrojyhmus conspicuus of the Trias of Wiirteniberg. 



The bones in my possession are from all parts of the skeleton, excepting 

 jaws and teeth ; fragments of skull, if present, are not yet determinable. 

 These show that Tanystrophiuus with Ca?lurus,* must be referred to a 

 family of the carnivorous suborder (Goniopoda) of the order Dinosauria. 

 The acetabulum is widely perforate, its pubic and ischiadic processes 

 being widely separated from each other. The pubis has a slender shaft 

 directed downwards, as in Oompsognathus, and in Creosaurusf as figured 

 by Marsh, with an anteroposterior expansion proximally, but no sym- 

 physis distally. On the other hand the ischia have a symphysis. The 



* Amer. Journal Sci. Arts, p. 339, Plate x. 



t Amer. Journal Sci. Arts, 1884, PI. xi, 1. c, p. 310. 



