88 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 1 39 



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 side, dorsal, and anterior views of the same specimen, ca. X 2. 21, 

 Posterior of the same specimen (coated) showing small foramen, ca. 

 X 2^. 22, Interior of the pedicle valve of the holotype, ca. X 2^, 

 showing small foramen, muscle field, and pallial marks. 23, Interior 

 of the brachial valve of the holotype showing cardinalia with falcifer 

 crura, thickened inner edges of crural bases, muscle field, and pallial 

 marks, ca. X 4- 



Recent, Fiji Islands. 



Photographs by permission of the Trustees of the British Museum 

 (Natural History) through Dr. H. M. Muir-Wood Deputy Keeper, 

 Department of Palaeontology. 



Plate 21 



Frieleia, Patagorhynchia, Septaliphoria, Cryptopora, Tegidorhynchia, 

 Mannia, and Hispanirhynchia? 



A. Hemithyris astoriana Dall = Frieleia ? nit ens Conrad 56 



Fig. 1. Section of the apex of the brachial valve showing the small 

 chamber and median septum, X 8, paratype U.S.N.M. 3487a. 

 Miocene, Astoria, Clatsop County, Oregon. 



B. Patagorhynchia patagonica (Ihering) 44 



Figs. 2-5. Respectively anterior, dorsal, side, and ventral views of a 

 fairly well-preserved specimen showing costellate ornamentation, 

 X 1, figured specimen U.S.N.M. 549387. 



Eocene, 1 to 2 miles southwest of Ancha Terriza, Rio de los Cier- 

 vos, Provincia de Magallones, Chile. 



C. Septaliphoria species 10 



Fig. 6. Interior of the dorsal valve tilted to show septalium and median 

 septum, X 2, figured specimen U.S.N.M. 129896a. 



Jurassic (Lower Callovian), in the railroad cut 300 meters east 

 of the station at Chatillon-sur-Seine, Department of Cote d'Or, 

 France. 



D. Cryptopora gnomon (Jeffreys) 22 



Figs. 7-14. 7-9, Respectively anterior, side, and ventral views of a com- 

 plete specimen, X 6, hypotype U.S.N.M. 44911a. 10, Anterior of an- 

 other specimen, X 6, showing the sulcate anterior margin, hypotype 

 U.S.N.M. 44911c. 11, Dorsal view of the preceding, X 8, showing 

 the nonauriculate deltidial plates. 12, Posterior of the pedicle valve, 

 X 8, showing deltidial plates, apical plate, and teeth, hypotype 

 U.S.N.M. 4491 id. 13, 14, Full and partial side views of the brachial 

 valve of the preceding interior showing median septum and maniculifer 

 crura. 



Recent, U. S. Fish Commission Station 2221, 1,525 fathoms, 36.9° F., 

 south of Marthas Vineyard, Massachusetts, in gray ooze. 



E. Tegidorhynchia doderleini (Davidson) 51 



Fig. 15. Interior of the pedicle valve, X 1 , showing pallial sinuses, after 

 Leidhold, Neues Jahrb. Min., Geol., Palaont., BB. 45, pi. 11, fig. ib 

 [here reduced 1/2], 1922. Original in Institute of Zoology, Strasburg 

 University. 

 Recent, Sagami Bay, Honshu, Japan. 



