BRACHIOPODA. 765 
lamellz are continuous, forming a simple transverse or subacute 
jugum. 
Fie. 294, Spiriferina Walcotti. Sowerby; showing muscular scars on walls of median septum 
of pedicle-valve. 
Shell substance strongly punctate throughout. 
Type, Spiriferina rostrata, Schlotheim (sp.). Lias. 
Distribution. Devonian (?) —— Jurassic. 
Thecocyrtella, Bittner. 1862. 
Synonym; Cyrtotheca, Bittner, 1890. 
Minute shells similar to Crrtiva in exterior and interior, but 
attached by the apex of the pedicle-valve. Surface smooth. 
Fias. 295-298.— Internal casts of Thecocyrtella ampezzana, Bittner, sp. (BITTNER.) 
Type, Thecocyrtella ampezzana, Bittner. 
Distribution. Triassic. 
Suessia, Deslongchamps. 1854. 
Shells, cyrtiniform, with high, often arched cardinal area; 
deltidial covering absent or lost. Surface plicate, with median fold 
and sinus on brachial and pedicle-valves respectively. On the 
interior of the pedicle-valve are two small dental lates which do 
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