PLATE XIX. 



Spieifeea obliteeata, Phillips. (Page 156.) 

 Fig. 



1. Phillips's type specimen, being a ventral valve, x f . Brushford. Museum of Practical Geology. 



2. Specimen of a dorsal valve, X f. Top Orchard. Hamling Collection. 



3. Another specimen with numerous ribs, x -§-. Asbhill Quarry. My Collection. 



4. A small specimen of the umbonal part of a dorsal valve, x 3. 4 a, umbo, x 6. Frankmarsh. My 



Collection. 



Spieifeea Ubii, Fleming. (Page 157.) 



5. An unusually large specimen of the ventral valve, x f. Eoborough. Porter Collection. 



6. A ventral valve, apparently of a variety of this species, with an unusually small beak and a very 



deep angular sinus, x 2. Barnstaple. "Woodwardian Museum. 



7. A small specimen of the dorsal valve, x 3. Ashhill Quarry. My Collection. 



Spieifeea mesomala, Phillips. (Page 158.) 



8. A small defective ventral valve with well-preserved surface, showing the smooth median sinus, x 5. 



Saunton Hotel. My Collection. 



9. A small and very badly preserved ventral valve, either of this species, or, more probably, of Sp. 



Verneuilii, X f . 9 a, view of area. 9 b, side view. Sloly Quarry. Mr. Up field Green's 

 Collection. 



Spieifeeina ceistata (Schlotheim), var. octoplicata, Sowerby. (Page 159.) 



10. Specimen of a ventral valve, showing the plaited surface, x 3. Poleshill. Porter Collection. 



11. A small ventral valve in the state of a cast, x 2. 11a, portion, x 15, showing the puncta of the 



surface. Poleshill. Porter Collection. 



Ehynchonella Paeteidgi.e, Whidborne. (Page 161.) 



12. Cast of dorsal valve, showing the fold with four ribs, x f. 12 a-, umbonal portion, x 4, showing 



the hinge arrangement. Pilton. Porter Collection. 



13. Ventral valve, showing the sinus with three ribs, the ridge bounding the muscular area, and the 



apical grooving of the ribs, x 2. Pilton. Porter Collection. 



14. Another specimen, x f. Eoborough. Porter Collection. 



Ehynchonella togata, n. sp. (Page 163.) 



15. Ventral valve, showing the two ribs on the sinus, x ■§-. " North Devon." Museum of Practical 



Geology. 



16. Another ventral valve, showing the coarse distant ribs and the muscular area. Marwood. 



Museum of Practical Geology. 



17. Umbonal portion of another dorsal valve (which has three ribs on the fold). Pilton. Barnstaple 



Athenaeum. 



18. A very defective dorsal valve, with no indication of lateral ribs, x f . Barnstaple. Museum 



of Practical Geology. 



