THE TRIASSIC PERIOD. 



209 



on the continent of Europe, and from the St Cassian and 

 Rhaetic beds still higher in the series; whilst some of the 



Fig. 141. — Triassic Conifers and Cycads. a, Voltzia {Schizoiieura) heierophylla, por- 

 tion of a branch, Europe and America ; b, Part of the frond of Pterophyllum Jcegeri, 

 Europe ; c, Part of the frond oi Podozaniites lanceolaUi^, America. 



Triassic strata of California and Nevada have likewise yielded 

 numerous remains of marine Invertebrates. The Protozoans 

 are represented by Foraininifera and Sponges^ and the Coelen- 

 ierates by a small number of Corals; but these require no 

 special notice. It may be mentioned, however, that the great 

 Palaeozoic group of the Rugose corals has no known repre- 

 sentative here, its place being taken by corals of Secondary 

 type (such as Montlivaltia^ Synastrcea, &c.) 



The Echinode7'ms are represented principally by Crinoids, 

 the remains of which are extremely abundant in some of the 

 limestones. The best-known species is the famous " Lily- 

 Encrinite" {Encrinus lilii/or??iiSj fig. 142), which is character- 



