JR. S. Lull — Mammals and Horned Dinosaurs. 323 



the Mesozoic orders, Multituberculata and Trituberculata, the 

 first of which is to be included under the infraclass Didelphia 

 or marsupials, while of the Trituberculata Matthew says some 

 are demonstrably marsupial, others of uncertain relationship, 

 none demonstrably placental (1914, p. 386). 



The list of genera and species thus far described from the 

 Lance follows (Hay 1902, pp. 564/:): 



ORDER MARSUPIALIA 

 Suborder Polyprotodontia 



(Trituberculata) 

 Family Stagodontidae Marsh 



Stagodon nitor Marsh 



" tumidus Marsh 



" validus Marsh 

 Thlceodon padanieus Cope 

 Platacodon nanus Marsh 



Family Cimolestidse Marsh 



Pediomys elegans Marsh 

 Batodon tenuis Marsh 

 Didelphodon comptus Marsh 



" ferox Marsh 



" vorax Marsh 



Cimolestes curtus Marsh 



" incisus Marsh 

 Telacodon Icevis Marsh 



" prcestans Marsh 



Family Dryolestidae Marsh 



Dryolestes tenax Marsh 



Suborder Allotheria (Multituberculata) 



Family Bolodontidae Osborn 



AUacodon fortis Marsh 

 " lentus Marsh 



" pumilis Marsh 

 " rarus Marsh 



Family Plagiaulacidse Gill 



Chnolomys agilis (Marsh) 

 " bellus Marsh 



" digona Marsh 



(Halodon) formosKs (Marsh)* 

 " gracilis Marsh 



(JVanomyops) minutus (Marsh)* 

 * Referred to Ptilodus by Gidley, 1909, pp. 622-623. 



