- 44 - 
Pisidium Dupuyanum Normand. Valenciennes (Dupuy) 
Basses-Pyrénées (Berillon). 
[Syn. P. Henslowanum Moq.-Td. var. dupuyanum 
Moq.-Td.] 
Pisidium Jaudouinianum Gassies. Agen (Gassies). 
Syn. P. Henslowanum Moq.-Td. var. Jaudouinia - 
num Moq.-Td.] 
Pisidium Heldreichi Clessin. Eubée. 
Pisidium abditum Haldman. Miami canal, Ohio (Fagot). 
Genre Galatea Bruguière 
[Syn. Egeria F. de Roissy ; Megadesma Bowdich ; 
Potamophila Sowerby.] 
Galatea- radiata Lamarck VI. 285, Encycl. pl. 250 
fig. 1. Chenu, p. 75, fîg. 327-328, Fleuves de Guinée. 
FAMILLE DES UNIONIDÆ 
I. — Subfamille des Unioninæ 
Genre Unio Retzius. 
[Syn. Elliptio Rfq. ; Eurynea Rfq. ; Mysca Turt. ; 
Margaron Lea ; Mya Humph. ; Lymnium Oken ; 
Luticola Goldfs. ; Cunicula Sw. ; Legumia Sw.] 
SECTIONS 
(1) Unio Retz. 
(2) Bariosta Rfq. 
(8) Canthyria Sw. 
Syn. Potamida Sw. 
(3) Naidea Sw. 
(4) Niaea Sw. 
(5) Hyridella Sw. 
(9) Iridea Sw. 
Syn. Tritogenia Agas. 
— Orthonymus Agas. 
(10) Rotundaria Rfq. 
Syn. Cyprogenia Agas. 
Syn. Micromya Agas. 
(6) Obovaria Rfq. 
(11) Quadrula Rfq. 
Syn. Theliderma Sw. 
(7) Lampsilis Rfq. 
Syn. Truncilla Rfq. 
— Pleurobema Rfq. 
— Syntoxia Rfq. 
— Scalenaria Rfq. 
— Plagiola Rfq. 
— Crenodonta Schlütr. 
— Æglia Sow. 
Syn. Rhipidodonta Morch. 
(12) Diplodon Spix. 
Syn. Cucumaria Conr. 
— Naja Sw. 
(13) Dysonomia Agas. 
. (14) Metaptera Rfq. 
Syn. Proptera Rfq. 
— Limnadia Sw. 
— Megadomus Sw. 
