38S FOREIGN JURASSIC CLYPEI. 



inclined, and almost vertical ; ambulacral petals less elongated than in the preceding 

 species ; base concave, much undulated ; mouth-opening excentral ; peristome with three 

 small lobes. Type of the species, T. 4. 



Formation. — " Marnes a Discoidees (Vesnlien) du Kornberg pres Frick et de Hornusseu 

 (Argovie)." Desor. 



Collections. — Mus. Bale, MM. Moesch, Schmidlin. 



