﻿BIVALVIA. 



121 



Montacufa, Turton (bidentata, Mont.). Shell small, thin, transverse or oblong 

 smooth ; equivalved, inequilateral ; two cardinal teeth in each valve, the hinder one formed 

 by the backward pressure of the connector. Palleal line simple. Connexus 

 cartilaginous. 



Sp/ienalia, S. Wood (substriata, Mont.). Shell small, thin, transverse, oblong, or 

 wedge-shaped ; equivalved ; very inequilateral, compressed, smooth ■ hinge edentulous or 

 with one obsolete tooth in each valve formed by the elevated side of the pit for the 

 connector. Palleal line simple. Connexus cartilaginous. 



Crag Species. 



Lepton squamosum, Mont. Crag Moll., vol. ii, p. 114, Tab. XI, fig. 8. 



— nitidum, Turt. Crag Moll., vol. ii, p. 116, Tab. XI, fig. 7. 



— deltoideum, S. Wood. Crag Moll., vol. ii, p. 115, Tab. XI, fig. 9. 



— depressum, Nyst. Crag Moll, vol. ii, p. 116, Tab. XI, fig. 6. 

 Laseea rubra, Mont. (Kellia). Crag Moll., vol. ii, p. 125, Tab. XI, fig. 10. 



— pumila, S. Wood {Kellia). Crag Moll., vol. ii, p. 124, Tab. XII, fig. 15. 



— Clarkice, Clark. Supplement, Tab. IX, fig. 10. 



— intermedia, S. Wood. 1 Supplement, Tab. X, fig. 22. 

 Bornia ovalis, S. Wood. Supplement, Tab. IX, fig. 3. 



Scacclda elliptica, Phil. {Kellia). Crag Moll., vol. ii, p. 121, Tab. XII, fig. 13. J 



— cycladia, S. Wood (Kellia). Crag Moll., vol. ii, p. 122, Tab. XI, fig. 4. 



— orbicularis, S. Wood (Kellia). Crag Moll., vol. ii, p. 120, Tab. XII, fig. 9. 

 Scintilla ambigua, Nyst {Kellia). Crag Moll., vol. ii, p. 120, Tab. XII, fig. 11. 



— comjjressa, Phil. (Kellia coarctata). Crag Moll., vol. ii, p. 123, Tab. XII, 



fig. 10. 



Kellia suborbicularis, Mont. Crag Moll., vol. ii, p. 119, Tab. XII, fig. 8. 

 Montacuta bidentata, Mont. Crag Moll., vol. ii, p. 126, Tab. XII, fig. 17. 



— elliptica, S. Wood. Supplement, Tab. X, fig. 21. 



— truncata, S. Wood. Crag Moll., vol. ii, p. 127, Tab. XII, fig. 16. 



— ferruginosa, Mont. Crag Moll., vol. ii, p. 129, Tab. XII, fig. 14. 

 Sphenalia substriata, Mont. (Montacuta). Crag Moll., vol. ii, p. 128, Tab. XII, 



fig. 12. 



— donacina, S. Wood (Montacuta). Crag Moll., vol. ii, p. 131, Tab. XI, 



fig. 3. 



'Cryptodon rotundatum, S. Wood. Crag Moll., vol. ii, p. 135, Tab. XII, fig. 19 (as 



Crgptodon ferruginosum. 



— sinuosum, Donovan. Crag Moll., vol. ii, p. 134, Tab. XII, fig. 20. 



1 This is from AJdeby. 



