PLATE XXII. 
SponDYLUS (continued). 
Fies. 
1—10. S. latus (Sowerby). (P. 121.) 
1. Woodwardian Museum. The type of S, equicostatus, Eth. Zone of Holaster 
subglobosus, Cherry Hinton. 1a, left valve; 1 }, posterior view of the same. 
2. Same collection, horizon, and locality. a, left valve; }, portion of same just 
ventral to centre of valve, x 4. 
3. Woodwardian Museum. Lower Chalk, Fulbourn. Left valve. 
4—9, Dr. Blackmore’s Collection. Zone of A. quadratus. 4—8, Hast Harnham ; 
9, West Harnham, near Salisbury. 
4. a, left valve, with part of right projecting; b, posterior view of both valves. 
5. Right valve. 
6. Left valve. Part near the umbo x 2. 
7. Left valve x 13. 
8. Left valve. a, x 13; b, posterior outline; c, ornamentation x 5. 
9. Left valve, with umbo and marginal parts of right valve x 1). 
10. Woodwardian Museum (Coll. Mr. W. Hill). Zone of H. subglobosus, cutting 
east of South Cave Station, Yorkshire. a, left valve; b, ornamentation x 4. 
11—14. 8S. Dutempleanus, d’Orb. Zone of A. quadratus. Dr. Blackmore’s 
Collection. 11—13, East Harnham. 14, Whaddon cutting. (P. 125.) 
11. a, left valve x 14; b, ornamentation x 4. 
12. a, left valve; 6, ornamentation x 3. 
13. Posterior view of both valves. 
14. Right valve. 
