236 



Annals of the Carnegie Museum. 



with ridges. The lower portion of the spine is elongated antero- 

 posterior^ and the edges are marked with sharp, double ridges. 



Three ribs (Fig. 3) also belong, in all probability, to the genus 

 Eryops. The head of each rib is broad and the articular edge is 

 divided between two faces which meet at an angle somewhat greater 



Fig. 2. Anterior view of dorsal spine of 

 caudal vertebra of Eryops. \. 



than a right angle ; the two faces are continuous. The shaft is some- 

 what flattened and in the undistorted specimens is gently curved. 

 The length of the largest rib is about .07 m. 



Other than these specimens there are several small intercentra and 

 the neural spine of a caudal vertebra from some undetermined 

 amphibian. 



Reptilia. 



Diadectidce. — This family is represented by a fragment of an upper 

 jaw with four teeth and the roots of a fifth and several chevron bones. 



The teeth (Fig. 4) are of peculiar interest as they represent an 

 intermediate stage between those of Bolbodon and those 



^Mm\ of Empedias. They seem to indicate with little doubt 



Vu^y the existence of a new genus which may be called 

 Desmatodon hollandi. The type is the specimen before 

 me, which I designate specifically as Desmatodon. The 

 teeth are transversely elongate ; the crown is slightly 

 wider than the root and is also somewhat swollen in 

 the antero-posterior direction. The outer half of the 

 crown rises gently into a sharp apex from which there is 

 a sharp descent to the inner half, which is lower than the outer half. 



Fig. 4. Tooth 

 of Desmatodon 

 hollandi. \. 

 Antero-poste- 

 rior diam. = 

 .001 m. 



