REPTILIA: LIMNOSCELIS 23 



Nothodon is proven eventually to be a distinct genus from Diadectes, 

 the family name Nothodontidae Marsh has precedence over Dia- 

 dectidae Cope. 



Diadectes, sp. 



In Plate XXXIV, Fig. 8, is given a photograph of an isolated 

 tooth, showing the root, which I refer somewhat doubtfully to a 

 small species of this genus. It was found associated with a very 

 large species of Diadectes in the Craddock bone-bed. 



Family Limnoscelidae 



Williston, American Journal of Science, XXXI, 380, May, 1911. 



Allied to the Diadectidae, but the mandibular and maxillary 

 teeth are elongate conical, those of the premaxillary very long, 

 and three in number on each side; skull nearly smooth, elongate, 

 depressed; no otic emargination; parietal foramen small; a single 

 sacral vertebra; carpus and tarsus incompletely ossified; no 

 hyposphene. 



LIMNOSCELIS 



Williston, American Journal of Science, XXXI, 380, May, 1911. 



Limnoscdis paludis Williston, op. cit. supra. New Mexico. 



The types and only known material of this genus and species 

 are two specimens, preserved in the Yale Museum, both from the 

 same immediate locality in Rio Arriba County, New Mexico, and 

 both inclosed in a like matrix, a rather dark, fine-grained sandstone, 

 in nodular form. These two specimens seem to be specifically 

 identical, as the slight differences observed between them may 

 well be due to age or conditions of fossilization. Of one of them 

 (No. 809, Yale Museum collections) there is a nearly complete 

 skeleton, save the skull and front feet and a part of one of the 

 hind feet; the preserved parts lie, for the most part, in orderly 

 articulation. The second specimen (No. 811) is almost perfect, 

 the only missing parts that I observed being the right hind foot, and 

 perhaps a part of the left hind foot, both of which had been more 



