392 Prof. 0. C. Marsh — Classification of Dinosaurs. 



Sub-order Compsognatha. 



(7) Family Compsognathidce. Skull elongate, with slender jaws 

 and pointed teetb. Cervical vertebras convexo-concave ; remaining 

 vertebras biconcave. Iscbia with long symphysis on median line. 

 Bones very hollow. Femur shorter than tibia ; astragalus with 

 long ascending process ; three functional digits in manus and pes. 



Genus Compsognathus. Jurassic. Only known specimen Euro- 

 pean. (Figure 2.) 



Fig. 2. — Compsognathus longipes, "Wagner. £. Jurassic, Bavaria. 

 Sub-order Ceratosauria (Horned saurians). 

 (8) Family Ceratosauridce. Horn on skull ; teeth large and 

 trenchant. Cervical vertebrae plano-concave ; remaining vertebras 



Fig. 3. — Ceratosatjrus nasicoenis, Marsh. 



Jurassic, Colorado. 



