BRrAcHIOPODA. 899 
(Type, Lacazella Mediterranea, Risso (sp.). Recent (Mediter- 
ranean); Fossil; Jurassic.— Tertiary.) 
Figs. 645, 646. Lacazella Mediterranea, Risso (sp.). (Davison). 
Subgenus Thecidiopsis, Munier-Chalmas. 1887. 
Interior of the brachial valve bearing a median septum with 
many branches and simple lateral marginal septa. Internal 
surface, septa and brachial lamella covered with granulations. 
Fias. 647-649. 
(Type, Theezdiopsis digitata, Sowerby (sp.). Cretaceous.) 
Subgenus Thecidella, Munier-Chalmas. 1887. 
Shells subtrigonal, generally transverse; with straight hinge- 
line, well-developed cardinal area and deltidium. In the 
brachial valve the median septum is broad, elevated on its lateral 
Fia. 650. Thecidella Normaniana, Munier-Chalmas. (CiaLERT.) 
margins, concave on its upper surface and irregularly perforated. 
Lateral lobes of the brachial lamellze simple. 
(Type, Thecidella Normaniana, Munier—-Chalmas.  Lias.) 
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