2o8 Bulletin American Museum of Natural History. [Vol. XVI, 



INCERT^ SEDIS. 



Genus INDRODON Cope. 



As stated above (p. 170) this does not belong near the 

 Anaptomorphidae, the molar structure being entirely different. 

 In previous articles, owing to the incorrect association of 

 another specimen (No. 823), there has also been much con- 

 fusion, which Matthew has partly cleared up (1897, p. 265). 

 Indrodon malaris Cope. — The type skull (Amer. Mus. No. 

 3080) is carefully redrawn in Fig. i^i- I^s conspicuous 



characteristics are: 

 slightly enlarged 

 median incisors, 

 three premolars 

 well spaced, fourth 

 premolar with deu- 

 terocone ; molars 



Fig. 33 



No. 3080. 



Indrodon malaris. 

 Left maxilla. 



Type. Am. Mus. Cope, 



with broad ex- 

 ternal cingulum, 

 crescentic para- and metacones and prominent mesostyle, 

 rudimentary hypocone. The molar teeth resemble those of 

 Olhodotes. 



Specimen No. 833 also belongs to 

 Indrodon but is more progressive than 

 Z. malaris, being distinguished by the 

 breadth of the ectoloph and additional 

 cusps on the fourth superior premolar. 

 Specimen No. 823 (Figs. 1,2) was as- 

 and Earle (1895, 

 to give us the 

 this animal; this 



very questionable '^'"^- ^°- 833-.. Fourth pre. 



•' ^ molar transpose 



ig. 34. Indrodon sp. Am. 



833. Fourth pre- 



sposed f rem leftside. 



sociated by Osborn 



p. 17) and believed 



skeletal characters of 



association appears 



(see page 171). 



2. Wasatch (Sparnacien, Ypresien) Stage. 



The genus Cynodontomys is only by courtesy and for want 

 of better knowledge separated from Microsyops . 



(Sp. 49) Cynodontomys latidens Cope. PSyn.A/. (Chriacus) 

 angulatus Cope. — Type : the two rami of a lower jaw (Amer. Mus. 



