Légende de la Pl. IV. 



21 — 2. Cuspidaria cochlearella, Desh. —3/1 Grignon (v. d.), Parnes (v. g.) 



21 — 3. Cuspidaria dispar, Desh. — 2 1 Parnes 



21 — 4. Cuspidaria boursaultensis, de Raine. — 2 1 Damerv . . . . 



21 — 5. Cuspidaria Raincourti, Desh. — 2/1 Cuise 



21 — 6. Cuspidaria cancellata, Lamk. — 3/1 Grignon. . . . 



21 — 7. Cuspidaria (Cardiomya) radiata, Desh. — 



5/1 Grignon. 



21 — 8. Cuspidaria Bouryi, Cossmann. — 3/1 Parnes, (a) Chenay 



22 — 1 . Fabagella faba, Desh. — 3/2 Grignon . . . 



23 — 1 . Pandora Defrancei, Desh. — 31 Villiers . . . 



23 — 2. Pandora dilatata, Desh. — Villiers, Hérouval 



23 — 3. Pandora primseva, Desh. — 4 1 Aizy .... 



23'"'s — l. Argyromya margaritacea, Lamk. — 3/4 Grignon. . . 



24 — 1 . Lyonsia plicata, Mellev. — Gr. nat Chàlons-s.-Vesle 



24 — 2. Lyonsia Baudoni, Cossm. — 3/1 [in Cossm.] Hérouval . . . 



25 — 1 . Thracia Prestwichi, Desh. — 3/4 Châlons-s.-Vesle 



25 — 2. Thracia Edwardsi, Desh. — Gr. nat Chàlons-s.-Vesle 



25 — 3. Thracia Ludovic», Desh. — Gr. nat Grignon. . . . 



25 — 4. Thracia grignonensis, Desh. — Gr. nat. Grignon, Chambors. 



25 — 5 . Thracia parvula, Desh. — Gr. nat Le Ruel . . . 



25 — 6 . Thracia microscopica, Cossm. — 5/1 L'Orme . . . 



25_7. Thracia halitus, Cossm. — 8/1 [in Cossm.] Ully-Saint-Georges 



26 — 1 . Neaeoroporomya argentea, Lamk. — 3 1 Parnes . . . 



27 — 1 . Endomargarus Heberti, Desh. — 3/1 Auvers . . . 



28-1. Pholadomya cuneata, Sow. — 1/2. La Fère . . . 



28 — 2. Pholadomya Konincki, Nyst. — 3 4 Wanzin . . . 



28 — 3. Pholadomya virgulosa, Sow. — Gr. nat Laon .... 



28 — 4. Pholadomya ludensis, Desh. — Gr. nat Ludes. . . . 



29 — 1 . Mactra semisulcata, Lamk. — 3 4 • Villiers . . . 



29 — 2. Mactra Levesquei, d'Orb. — Gr. nat. [voir aussi Pl. V] Cuise. . . . 



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