LÉGENDE DE LA. PL. XXXVII. 



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49. 



50 



51 



52 



53. 



Arca 

 Arca 

 Arca 

 Arca 

 Arca 



54 . Arca 



55 . Arca 



56 . Arca 



57. Arca 



58 . Arca 



59 . Arca 



Fossularca) quadrilatera, Desh. — 2/1 Grignon Lut. 



Fossularca) capillacea, Desh. — 3/2 Valmondois Bart 



Fossularca) dispar, Desh. — 2/1 Hérouval Guis. 



Fossularca) margaritula, Desh — 5/2 Hérouval Guis. 



Fossularca) Cossmanni, de Laub. — 3/1 Chenay Than 



Fossularca) textilis, Desh . — 4/1 Cuise Cuis . 



Fossularca) decipiens, Desh. -- 3/1 Marines Bart 



Fossularca) multidentata, Desh. — 4/1 Grignon Lut. 



Fossularca) lissa, Bayan. — 6/1 Grignon Lut. 



Fossularca) effossa, Desh. — 6/1 Guise Cuis. 



(Than.) 

 (Lut., Barl.) 



(Bart. 



Ferme de l'Orme. . . , Lut. 



Chaumont Lut. 



Sandricourt Lut. 



Parnes ......... Lut. 



Chaussy Lut. 



(Barl. 



(Cuis. 



Fossularca) Bezançoni, Cossm. — 6/1 



60. Arca (Fossularca) Chevallieri, Cossm. — 8/1. [in Cossm.]. 



61. Arca (Cucullaria) heterodonta, Desh . Gr. nat 



62 Arca (Cucullaria) cucullaris, Desh . — Gr. nat 



63. Arca (Cucullaria) adversidentata, Desh. — 3/2 



64 Arca (Cucullaria) Caillati, Desh. — 2/1 Grignon Lut. 



1. Cucullaea crassatina, Lamk. — Gr. nat Noailles Than. 



1. Mytilus acutangulus, Desh. — Gr. nat Valmondois Bart. 



2. Mytilus rimosus, Lamk — Gr. nat Grignon, Damery . . . Lut. 



3. Mytilus subantiquus, d'Orb. — Gr. nat Châlons-sur-Vesle . . . Than. 



4. Mytilus Isevigatus, Desh. — Gr. nat Vauxbuin Sparn. 



5. Mytilus eurynotus, Cossm. — Gr. nat Aizy Cuis. 



6. Mytilus (Arcomytilus) Rigaulti, Desh. — Gr. nat Lizy . Bart. (Lut.) 



7. Mytilus (Arcomytilus) Levesquei, Desh. — Gr. nat Cuise Cuis. 



8. Mytilus (Arcomytilus) Biochei, Desh. — Gr. nat. [in Cossm.]. Argenteuil Bart. 



9- Mytilus (Arcomytilus) Dutemplei, Desh. — Gr. nat Chavot, Pourcy .... Sparn. 



10. Mytilus (Arcomytilus) catalaunensis, Cossm. — Gr. nat. . . . Cbàlons-sur-Vesle . . . Than. 



1. Septifer serratus, Mellev. — 3/2 Hérouval Cuis. 



