Bracuropopa. 859 
Dinarella, Bittner. 1892. 
Small trigonal, smooth shells with deep margin at the sinus on 
the brachial valve. Foramen suboval, deltidial plates partially 
developed. Brachial valve with a median septum ; brachidium 
& 
¥Fias. 485-490. Dinarella Haueri, Bittner. (BrrrnrrR.) 
composed of descending lamella, which converge and. unite to 
form a free vertical median plate. 
Type, Dinarella Haueri, Bittner. 
Distribution. Trias. 
Megalanteris, Suess. 1855. 
(Plate 61, figs. 8-11.) 
Shells large, smooth, equally biconvex; suboval in outline. 
Shell substance punctate. Cardinal and lateral margins of the 
Fie. 491. Fia. 492. 
Megalanteris Archiaci, de Verneuil. 
Fies 491, 492. A restoration of the brachial apparatus. 
(Sugss.) 
valves inflected. Apex of the pedicle-valve truncated by a 
foramen, beneath which lies a triangular delthyrium from which 
Astute 
