NO. 5 RHYNCHONELLOID BRACHIOPODS — COOPER JJ 



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 men, X 2, showing the imbricating ornament. 24, A partially exfoli- 

 ated pedicle valve showing the impression of the muscle scars, X 2, 

 hypotype U.S.N.M. 89855b. 



Miocene (Ototaran), Broken River, Trelissick Basin, Canterbury, 

 New Zealand. 



Tegulorhynchia doderlcini (Davidson) 51 



Figs. 25-31. 25, Dorsal view of a complete but small specimen, X 2, 

 showing imbricate ornament, hypotype U.S.N.M. 549317b. 26, 27, 

 Tilted and full views of the interior of the pedicle valve showing the 

 muscle field and dental plates, X 2, hypotype U.S.N.M. 5493i7d. 

 28, Beak and teeth of the pedicle valve, X 4. showing nearly conjunct 

 deltidial plates, hypotype U.S.N.M. 5493i7f. 29-31, Respectively full 

 view of the cardinalia, lateral view, and with shell tilted to show short 

 median ridge and hinge plates, X 4, hypotype U.S.N.M. 549317c. 

 The crural points have been broken off. 



Miocene or Pliocene (Shinzato tuff), high road cut along Highway 

 64, about 0.1 mile west of sharp bend in road about 0.3 mile east of 

 Yashitomi, Okinawa, Ryukyu Islands. 



Plate 6 



Patagorhynchia and Notosaria 



A. Patagorhynchia patagonica (von Ihering) 44 



Figs. 1-4. Respectively dorsal, posterior, side, and anterior views of a 

 complete but imperfect specimen showing imbricated ornamentation, 

 X i> hypotype Princeton University. 

 Eocene (Patagonian), Lake Pueyrredon, Argentina. 

 Figs. 5, 6. Interior of the pedicle and brachial valves, X 1, showing 

 concave deltidial plates and thickened cardinalia. (After von Ihering, 

 1903, pi. 3, figs. 11a, 11b.) 



Eocene (lower Patagonian), north of Seco River and San Julian, 

 Argentina. 



B. Notosaria nigricans ( Sowerby ) 48 



Figs. 7-17. 7-9, Respectively side, dorsal, and anterior views of a com- 

 plete specimen showing commissure and folding, X I. hypotype 

 U.S.N.M. 111018b. 10, The beak of the preceding specimen enlarged, 

 X 3, to show apical plate, small disjunct deltidial plates, and large, 

 incomplete foramen. 11, 12, Interior of pedicle valve respectively tilted 

 and in full view, X 2, to show apical plate, teeth, muscle scars, dental 

 plates, deltidial plates, and numerous pallial sinuses, hypotype 

 U.S.N.M. 111018a. 13, Posterior of same, X 3, showing foramen, 

 small disjunct deltidial plates, and large teeth. 14, 15, Brachial valve 

 in full and tilted views to show cardinalia, transverse cardinal process, 

 inconspicuous median ridge, muscle scars, and numerous pallial 

 sinuses, X 2, hypotype U.S.N.M. 111018a. 16, Posterior of same, 

 X 4. showing cardinal process and curved crura. 17, Same tilted to 

 show crura in side view, X 4- 



Recent, Stewart Island, New Zealand. 



