( 159 ) 



EXPLICATION DES PLANCHES 



I 1-4 Psammechlniis Cailliaudi Des N». 2 



5-9 — Biarritzensis Cott 2 fe;.s 



10-14 Heberiia Meridanensis Cott 3 



14-17 Micropsis BiarrUze7isis Coit 4 



1! 1-5 Cyphosoma Pellati Cott. 9 



6-M — Alacicum Cott fi 



-12-14 Rhabdocidaris Pouechi Cott 12 



15-16 Porocidaris serrata Des 13 



17-22 Cidaris pseudo-serrata Cott 15 



II! 1-3 Pyrina Raulini Cott 25 



4-5 Sculella sublelragona de Grat 2S 



6-9 EchinanUms subrotundus Des 39 



IV 1-6 Cassidulus ovaiis Cott 33 



7-8 Echinanlhiis Archiaci Cott 41 



9-10 — Pouechi Cott 42 



11-14 — lesiudlnarius Des 43 



V 1-3 — Pyrenaicus Cott 44 



4-7 — Wrighli Cott 38 



8-11 — Alaxemsis Cotl 45" 



