EXPLICATION DE LA PLANCHE XVII 



FiG. 1, la, li, le. — Eucyclus Andleri Martin Grandeur triplée 



2, 2a, 2b, 1c. — Pleurotomaria rotellaeformis Dunker — naturelle 



3. — Pleurotomaria jamoignaca Terq. — naturelle 



et PlETTE 



4, 4a. — Pleurotomaria planispira nov. sp. — naturelle 



5, 5a. — Mytilus Stoppanii Dumortier — doublée 

 6, 6a, 6jb. — Gardinia quadrangularis Martin — naturelle 



7, la.. — Gardinia hybrida Sow. — naturelle 



8, 8a. — Astarte Ghartroni Gossmann — triplée 



9, 9a. — Lucina arenacea Terquem — naturelle 



10, loa, loi, 10c, lod. — Lucina (Phacoides) exigua 



Terquem — doublée 



11, lia, ni». — Montlivaultia Guettardi Blainville — naturelle 



12, 12a. — Montlivaultia Haimei Ghapuis cIDe-walque — naturelle 



13, 13a, 136. — Arietites rotiformis Sow. — naturelle 



14,14a. — Miocidaris Martini Gotteau — doublée 



Bull. Soc. oéol. de Fr. (4), XII, 1912. 



