196 PROCEEDINGS OF THE SCIENTIFIC ASSOCIATION. 
Cl. concavus to the species. Among my original speci- 
mens from Anguilla are some -which approach more 
nearly to the figure of Cl. ellipticus given by Michelin 
than the example figured by Cotteau does ; and I am not 
at all sure whether upon an examination of a large series 
my first determination may not ultimately be adopted. 
7. Sismondia antillarum, Cotteau. 
Cotteau, Echinides tert., p. 17, pi. iii. , f. 1 — 4. 
Eocene, S. Barts, 
8. Sismondia anguillse, Cotteau. 
Cotteau, op. cit., p. 18, pi. iii., f. 5 — 8. 
Miocene, Anguilla. 
9. Echinolampas ovumserpentis, Guppy. 
Journ. Geol. Soc., vol. xxii., p. 300, pi. xix., f. 4 — 6. 
Cotteau, Echinid. tert., p. 20, pi. iii., f. 13 — 21. 
I am inclined to regard Eclu antillarum ;, Cotteau 
(p. 19, pi. iii., f. 9— -12), as a form of this species. 
Eocene, S. Barts (also Trinidad). 
10. Echinolampas clevei, Cotteau, 
Cotteau, Echinid. tert., p. 23, pi, iv., f. 1 — 5. 
Apparently a very distinct form. Eocene, S. Barts. 
11. Echinolampas lycopersicus, Guppy. 
Journ. Geol. Soc., vol. xxii., p. 300, pi. xix., f. 8. 
Cotteau, Echinid. tert., pi. iii., f. 22 — 26. 
I regard Ech. amguMm (Cotteau, p. 24, pi. iv., f. 6 — 8) 
as merely an unusual form of this species. 
Miocene, Anguilla. 
12. Echinolampas semiorbis, Guppy. 
Journ. Geol. Soc., vol. xxii., p. 299, pi. xix., f. 7. 
Cotteau, Echinid. tert., p. 24, pi. v., f. 1, 2 ; and 
pi. vi., f. 1. Miocene, Anguilla. 
