82 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I48 



Pedicle valve interior with dental plates strongly curved toward 

 midline, meeting above floor to form spondylium duplex and high 

 median septum duplex ; height of septum increasing anteriorly. 



Brachial valve interior with short hinge plate ; low cardinal boss at 

 apex, finely fimbriate for insertion of diductor muscles ; camarophorium 

 low and thick at posterior, curving ventrally toward anterior on in- 

 creasingly high median septum duplex, edges touching hinge plate 

 at posterior ; intercamarophorial plate absent. 



Type species. — Camarophoria antisella Broili, F., 1916, Die Per- 

 mischen Brachiopoden von Timor, in Wanner, J., ed., Paleont. von 

 Timor, No. 12, p. 58, pi. 126 (12), figs. 1-3, 5 (by designation of 

 Licharev, 1934). 



Comparisons. — Camarophorina is characterized by its smooth shell 

 with the commissure sulcate rather than uniplicate. Internally, the 

 spondylium is elevated on a rather high median septum (as in Psilo- 

 camara) ; the camarophorium is thick in the posterior region, with the 

 edges touching the underside of the hinge plate as in Camarophorinella 

 Licharev, and the intercamarophorial plate is absent. It is the only 

 sulcate genus known in the Stenoscismatacea. In addition, it differs 

 from Psilocamara in its larger size, flat-crested fold, and camarophor- 

 ium that touches the hinge plate. It differs further from Camarophori- 

 nella in its lack of costae. 



The tightly curved ventral beak on some individuals recalls Camer- 

 isma, Cyrolexis, and Late Permian species of Stenoscisma. The sulcate 

 commissure of Camarophorina distinguishes it easily from those gen- 

 era. In addition, the absence of an intercamarophorial plate differenti- 

 ates it from Stenoscisma and Camerisma, and absence of costae sepa- 

 rates it from Cyrolexis and Stenoscisma. 



Species assigned to camarophorina. — Camarophoria antisella 

 Broili ( 1916) from the Permian of Timor is the only species that can be 

 assigned with certainty to the genus. Rhynchonella hanieli Broili 

 (1916) from the same locality also may belong to Camarophorina on 

 the basis of its smooth and sulcate exterior, but its internal features are 

 unknown. Rhynchonella wettonensis Davidson from the Lower Carbon- 

 iferous limestone of Staffordshire, England, also might be assigned 

 doubtfully, as it is sulcate and specimens in the U.S. National Museum 

 seem to show edges of what may be a camarophorium near the apex of 

 the brachial valve. This assignment is so uncertain, however, that the 

 range of the genus ought not to be extended confidently to the Missis- 

 sippian on the basis of that species. 



Range. — Permian of Timor; possibly originating in the Carbonif- 

 erous of England. 



