PLATE III. 



All the figures in this Plate are from specimens in my Collection, except where otherwise stated. 



FlS. ISOCHILINA CANALICULATA, Kratise. (Page 15.) 



1. Right (?) valve, x 15. 1 a, ventral view. 1 J, end view. Upcott Arch Quarry. 



2. Left valve, x 15. 2 a, ventral view. 2 b, end view. Upcott Arch Quarry. 



Apaechites Lindstecemi, Jones, var. excellens, u. v. (Page 16.) 



3. Left valve, x 15. 3 a, ventral view. Kingdon's, Shirwell. Barnstaple Athenseum. 



Peimitia spaesinodosa, n. sp. (Page 16.) 



4. Small left valve, x 30. Saunton Hotel. Partridge Collection. 



5. Large right valve, x 30, having small tuhercles, which are not, however, distinctly shown in the figure. Saunton 



Hotel. Partridge Collection. 



6. Ventral view of another right valve, x 30, showing one of the tubercles. Saunton Hotel. Partridge Collection. 



Peimitia, sp. (Page 17.) 



7. Specimen, x 30, showing the indistinct furrow and roughened surface. Pilton. Porter Collection. 



8. 9. Specimens, x 30, showing the dorsal furrows more clearly, and a rim at the posterior end. Saunton Hotel. 



Partridge Collection. 

 10, 11. Very much distorted valves, doubtfully referred to this species, x 25. Saunton Hotel. 



Peimitia ? sp. (Page 18.) 



12. Left valve, x 30, showing the slight furrow. Saunton Hotel. Partridge Collection. 



Peimitia doesicoenis, TJlrich, sp. (Page 18.) 



13. Right valve, x 30, showing the small dorsal projection. Saunton Hotel. Partridge Collection. 



Peimitia vestita, n. sp. (Page 19.) 



14. Specimen, x 15. Pilton. Porter Collection. 



Beteichia ^quilateea. Mall ? (Page 20.) 



15. Specimen, x 30, showing furrows, but perhaps shortened by pressure. Saunton Hotel. 



Beteichia Damesii, Krause 1 (Page 21.) 



16. Left valve, x 30, showing the lobes. Pilton. Porter Collection. 



Beyeichiopsis Rupeeti, n. sp. (Page 22.) 



17. Right valve, x 30, showing the tubercles, the longitudinal ridges, and the fringed border. Pilton. Porter Collection. 



Klcedenia BUEsa:FOEMis, n. sp. (Page 22.) 



18. Right valve, x 15, showing the median defined lobe and the confluent lateral lobes, probably lengthened by pressure. 



18 a, ventral view. Laticosta Cave, Baggy. 



19. 20. Two valves, x 15, lengthened by pressure, indistinctly showing the lobes. Same locality. 



21. Left valve, x 15, shortened by pressure, with rim and small lobes. 21 a, ventral view. 21 h, end view. Same 



locality. 



22. Right valve, x 15, shortened by pressure, in which the lobes appear long and narrow, and the front lobe apparently 



bifid. 22 a, ventral view. Same locality. 



23. Left valve, x 15, obliquely distorted, in which the posterior lobe seems small and oval and the ventral side low and 



flattened. Same locality, 



Uleichia inteeseeta, n. sp. (Page 23.) 



24. Left valve, x 30, showing the thickened elevated ends and the two defined central lobes. Laticosta Cave, Baggy. 



Peimitia botieeons, n. sp. (Page 19.) 



25. Left valve, x 10, showing the surface, the central margined furrow, and the position of the horns; perhaps slightly 



shortened by pressure. Laticosta Cave, Baggy. 



26. Cast of left valve, x 10, showing the horns, slightly distorted. Same locality. 



27. Mould of a small right valve, x 15, showing the ornament and the border; squeezed into a symmetrical shape. 



Same locality. 



28. Portion of another specimen, x 30, showing the character of the ornament and the crenulated border. Same locality. 



29. Very large right valve, x 10, drawn from an external mould. (The posterior horn is restored.) Pilton. Porter 



Collection. 



30. Cast of a right valve, x 10, much elongated by pressure, showing the horns. Laticosta Cave, Baggy. 



