306 



COLLYRITID^. 



The family CoLLYUiTiDiE include?, r.'^ present four genera Disaster, Collyrites, Metapo- 

 rJiinus, and Grasia, which are limited to the Oolitic and Cretaceous rocks. The most 

 ancient form at present known was found in the Lias; the species attained their 

 greatest development in the middle division of the Oolites, are sparingly found in the 

 Neocomian,v and Lower Cretaceous rocksj and finally disappear with the White Chalk. 



The following table exhibits the stratigraphical distribution of the Oolitic species 

 of this family. 



Stratigraphical Distribution of the Oolitic Species of the CollyritidjE. 



List of Species. 





c3 



"o 

 O 



c 

 c 



a3 

 O 

 u 



o 



1 



►4 



c 



o 



o 

 O 



to 



a 



a 



Type localities. 



Disaster. 



Disaster granulosus, Desml. 

 „ anastero'ides, Leym. 

 „ Moeschii, Desor 



Collyrites. 



Collyrites prior, Desor 



5, ringens, Desml. . 



5, ovalis, Leske 



„ elliptica, Desml. . 



„ castanea, Desor . 



5, transversa, D'Orbig. . 



„ bicordata, Leske . 



„ carinata, Desml. . 



„ capistrata, Desml. 



„ Buchii, Desor 



„ Voltizii, Agass. . 



„ Desoriana, Cotteau 



„ pinguis, Desor 



„ Orbigniana, Cotteau . 



,, Loryi, Alb. Gras. 



„ acuta, Desor 



„ conica, Cotteau . 



„ faba, Desor 



Metaporhinus. 

 Metaporhinus Michelinii, Cott. . 

 „ Censoriensis, Cott. 



Grasia. 

 Grasia elongata, Alb. Gras. 



* 



* 

 * 



* 

 * 



* 



* 

 * 

 * 



* 



* 



* 

 * 



* 



* 



* 



* 



* 



* 

 * 



* 



* 



* 

 * 



* 



* 



Amberg, Streitberg, Wurtemberg. 

 Bar-sur-Aube (Aube). 

 Kornberg (Argovie). 



Frick, (Canton d' Argovie). 

 England, France, Switzerland. 

 England, France, Switzerland. 

 Chaufour, Mamers (Sarthe). 

 St. Croix, de Pouillerel. 

 Escragnolles (Var). 

 England, France, Switzerland. 

 Gunsberg (Canton Soleure.) 

 Wurtemberg, Switzerland. 

 Sirchingen, Wiirtemberg. 

 Voirons pres Geneve. 

 Chatel-Censoir, Druges (Yonne). 

 Botzberg, Geissberg (Argovie). 

 Stigny (Yonne). 

 Echaillon (Isere). 

 Villiers-les-Haut's (Yonne). 

 Pacy, Ancy-le-Franc (Yonne). 

 Ueken pres d'Effingen (Argovie). 



Chritel-Censoir (Yonne). 

 Ciiatel-Censoir (Yonne). 



Ecliaillon (Isere). 



