82 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I39 



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 rior view of the cardinalia of the same brachial valve as the preceding, 

 X 4, showing the broad and flat outer hinge plates. The crura are 

 shorter than normal because of slight breakage at the distal extremity. 

 U. S. Bureau of Fisheries Station 5487, 585 fathoms, 52° F., on mud, 

 off Panaon Island, Philippines. 



Plate 13 

 Hispanirhynchia? and N cohemithyris (=Basi!iola) 



A. Hispanirhynchia? species 60 



Figs. 1-5. 1-3, Respectively ventral, dorsal, and anterior views of a 

 somewhat crushed specimen, X !> figured specimen U.S.N.M. 549361. 

 4, Dorsal view of the preceding specimen, X 2, showing foramen. 5, 

 Beak of the preceding, X 4, showing foramen and disjunct deltidial 

 plates. 



Eocene (lower), 200 meters south of the south side of the River- 

 side Yacht Club, west side Almendares River, in Reparto Kohly, Ha- 

 bana Province, Cuba. 



B. Basiliola lucida (Gould) 34 



Figs. 6-23. 6-10, Respectively posterior, anterior, dorsal, side, and ven- 

 tral views of a complete specimen, X i» showing small size, rounded 

 form, and nearly smooth exterior, hypotype U.S.N.M. 110826a. 11-13, 

 Respectively anterior, side, and dorsal views, X 2, of the preceding 

 specimen showing the same features. 14, Interior of the pedicle valve, 

 X 2, showing pallial marks indistinctly, hypotype U.S.N.M. 110826b. 

 15, Apex of same specimen, X 4, showing corrugated tooth and con- 

 junct deltidial plates. 16, The same specimen tilted to show the 

 pedicle collar and dental plates, X 4- 17, 18, Interior and tilted views 

 of another pedicle valve showing the pallial marks, foramen, teeth, 

 and deltidial plates, X 4, hypotype U.S.N.M. 110826c. 19, Interior 

 of the brachial valve, X 2, hypotype U.S.N.M. 110826b. 20, Posterior 

 part of the same specimen showing the cardinalia with the long falci- 

 fer crura, X 4- 21-23, Respectively side, tilted anterior, and full views 

 of another brachial valve, X 4. showing the long falcifer crura, the 

 small elevated inner hinge plates, corrugated sockets, small genital 

 areas, and pallial marks, hypotype U.S.N.M. 110826c. 



Recent, U. S. Fish Commission Station 4936, rocky bottom at 103 

 fathoms, Kagashima Gulf, Kyushu, Japan. 



Plate 14 



Basiliola and Fricleia 



A. Basiliola bcecheri (Hall) 25 



Fig. 1. Interior of the pedicle valve of an obese specimen, X 2, showing 



thickened marginal rim and pallial marks, hypotype U.S.N.M. 334667. 



Recent, U. S. Fish Commission Station 3864, 163 to 198 fathoms, 



55.9 F., Pailolo Channel, Hawaiian Islands. 



Fig. 2. Dorsal view of the apex of a pedicle valve showing the deltidial 



plates with their reflected rim and the anterior smooth area of the 



