FAUNA OF THE MORMON SANDSTONE. 



405 



Tayloroille, < 'alifornia. 

 Gervillia, n. sp. 



Gervillia. n. sp. 



Lima dilleri, n. sp. 

 Lima, n. sp. 



Lma taylorensis, n. sp. 



( 'tenostreon, n. sp. 



Pecten, n. sp. 



Pecten, n. sp. 



Pholadomya, n. sp. 



Trigonia, n. sp. 



Trigonia, n. sp. 

 Belemnites, n. sp. 



Sphseroceras, n. sp. 

 Grammoceras, n. sp. 



Grammoceras, n. sp. 



Europe. 



G< rvillia lanceolata of the upper Lias, 

 but longer and narrower in pro- 

 portion, and the posterior wing- 

 larger. It is in fact a more pro. 

 gressive form in the same series of 

 species than Gervillia lanceolata. 



Gervillia aviculoides, Sow.: great 

 Oolite. 



Zk'ma cardiiformis, Sow. ; great Oolite. 



£/>/w tenuistriata, Miinst. and Goldf. ; 

 inferior Oolite. 



/>////" rigidula, Mor. et Lye.; great 

 Oolite. 



Ctenostreon pectiniformis, Mor. et Lye. ; 

 inferior and great Oolite. 



Licit a disciformis, Schubl. ; inferior 

 Oolite. 



/'< ctew demissics-gingensis, Quenst. ; in- 

 ferior Oolite. 



Pholadomya fidicula, Zeit. ; inferior 

 Oolite. 



Trigonia hemispherica, Lye; inferior 

 Oolite-. 



Trigoniaformosa, Lye. ; inferior Oolite. 



Belemnites breviformis, Voltz. ; upper 

 Lias to inferior Oolite. 



Sphseroceras gervilli ; inferior Oolite. 



Grammoceras toarcense, as figured by 

 Buckman; interior Oolite. 



Grammoceras leurum, Buekm.; in- 

 ferior Oolite. 



The fossils indicate the former existence of a fauna which can he pro- 

 visionally considered as belonging to the upper part of the inferior 



Oolite. 



Tnoceramus Bed. — Emmediately above the Mormon sandstone with its 

 rich fauna there are strata of a red sandstone containing very few re- 

 mains ami these usually in poor condition. Three species of fossils were 

 found in them: a Terebratula, apparently the same as that occurring so 

 plentifully in the typical Morman sandstone: two fragments of a large 



