BRAcHIOPODA. 835 
Peregrinella, (hlert. 1887. 
Shells of large size, pedicle-valve the more convex. Valves 
without median fold and sinus. Margins even; surface plicate- 
Fias. 438, 439.—Peregrinella multicarinata, Lamarck (sp.). (QUENSTEDT.) 
Beak short, scarcely prominent; cardinal area and deltarium 
well developed. 
Type, Peregrinella multicarinata, Lamarck (sp.). 
Distribution. Cretaceous. ' 
Hemithyris, D’Orbigny. 1847. 
Shells smooth or faintly plicate; median fold and sinus 
obscure. Beak high, with large triangular pedicle-passage and 
very slightly developed deltidial plates. Teeth prominent; 
dental plates absent. Hinge-plate divided medially, but without 
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