190 SUPPLEMENT TO THE BRITISH 



178. Rhynchonella plicatella, Sow. Dav., Ool. Mon., p. 86, PI. XVI, figs. 7, 8; 



and Sup., PI. XXVII, figs. 4—7. 



Nothing new. Inferior Oolite. Is abundant at Bradford Abbas, Crewkerne 

 Station, near Sherborne, and other places in Dorsetshire and Somersetshire. The 

 young of this species are of an elongated triangular shape and much flattened. 1 



179. Rhynchonella Sutherlandi, Dav. Sup., PI. XXV, figs. 5 — 8. 



Rhynchonella Sutherlandi, Dav. Quart. Journ. Geol. Soc, vol. xxix, p. 196, pi. 



viii, figs. 1, 2, 1873. 



Shell transversely oval, wider than long, greatest breadth about the middle. Ventral 

 valve convex ; sinus wide, moderately deep ; foramen rather small, placed under the 

 incurved extremity of the beak, and surrounded and slightly separated from the hinge- 

 line by a deltidium of small dimensions. Dorsal valve deeper and more convex than the 

 opposite one, sometimes very gibbous, and divided into three portions, the central one 

 being formed by a wide mesial fold. Surface of each valve marked with from sixteen to 

 thirty large angular ribs, of which from six to twelve occupy the fold, five to thirteen the 

 sinus. Proportions very variable. A large specimen measured — 

 Length 2f inches, breadth 2f inches. 



Obs. — This is one of the largest species of the genus with which I am acquainted^ 

 having been exceeded in size, as far as I am aware, only by Rh. multicarinata, Lamarck, 

 T. peregrina, Von Buch, and the Rh. inconstans speciosa of Miinster. In general shape 

 and character Rh. Sutherlandi most nearly approaches the smaller Rh. Renauxiana, 



1 The student is referred for further details respecting the species of Brachiopoda from the Inferior 

 Oolite of the Bradford Abbas district to my paper published in the ' Proceedings of the Dorset Natural 

 History and Antiquarian Field Club ' for 1877. Therein the following species are figured and described : 

 — 1. Ter. perovalis, Sow., and var. ampla, Buckman. 2. Ter. Stephani, Dav. 3. Ter. Phillipsii, 

 Morris. 4. T. Ferryi, E. Desl. 5. T. globata, Sow. 6. T. Eudesei, Oppel. 7. T. sphceroidalis, 

 Sow. 8. T. decipienSy E. Desl. 9. T. Wrightii, Dav. 10. T. Cranece, Dav. 11. T. Buckmani, Dav. 

 12. Waldheimia anglica, Oppel. 13. W. Waltoni, Dav. 14. W. emarginata, Sow. 15. 1 W. carinata, 

 Lamk. 16. W. Meriani, Oppel. 17- W. ornithocephala, Sow. 18. TFald.,sp. 19. 1 W. cardium, Lam. 

 20. Rh. plicatella, Sow. 21. Rh. subtetrahedra, Dav. 22. Rh. subangulata, Dav. 23. R. Forbesei, 

 Dav. 24. Rh. spinosa, Schl. 25. Rh. senticosa, Von Buch. 26. Rh. ringerts, Herault. 27. Rh. cyno- 

 cephala, Rich. 28. Rh. Stephansi, Dav. 29. Rh. parvula, E. Desl. This is a very remarkable assemblage 

 of Brachiopoda from a single formation and district. Prof. Buckman appends to the paper a very interesting 

 notice of the geology of the Inferior Oolite. 



