Bulletin 35 
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18. Prenaster loveni, Cotteau. 
Cotteau, Echinid. tert., p. 34, pi. vi., f. ii — 15. 
It seems to be .straining generic distinctions rather 
tightly to separate Prenaster from Agassizia ; but it is 
to be feared that many authors carrj' subdivision to an 
excessive length among echiuoderms. 
Eocene, S. Barts. 
19. Brissus exigiais, Cotteau. 
Cotteau, Echinid. tert., p. 35, pi. vi., f. 16, 17. 
The examples of this species recorded bj' me in 1 866 
Journ. Geol. Soc., vol. xxii., p. 301) as Dr. dimidiatus 
Ag. (=unicolor Klein) were much larger and in better 
pre.servation than the single specimen of Cleve’s collec- 
tion. I leave the species under the name given to it 
by Cotteau, though I have doubts as to the possibility 
of finding grounds for a clear specific distinction between 
it and the recent form. 
20. Brissopsis antillarmn , Cotteau. 
Cotteau, Echinid. tert., p. 37, pi. vi., f. 19 — 25. 
Miocene, Anguilla. 
21. .Macropneustes antillarum, Cotteau. 
Cotteau, Echinid. tert., p. 39, pi. vii., f. i — 3. 
Eocene, S. Barts (also Cuba). 
22. Macropneustes clevei, Cotteau. 
Cotteau, Echinid. tert., p. 40, pi. vii., f. 4 — 7. 
Miocene, Anguilla. 
For these two species, and for another one found in the 
Pyrenees, Cotteau has created a new genus, Pcripjicustes. 
23. Plagionotus loveni, Cotteau. 
Cotteau, Echinid. tert., p. 41, pi. viii., f. 7, 8. 
