BRITISH MOLLUSCA. 
10 / 
Unio riparia, Pfeiffer , ii. t. 5. f. 13? 
Unio margaritifera, Pfeiffer, ii. t. / • f. 1. 
a — d. River Conway, North Wales. Presented by Richard 
Williams, Esq. 
e. Thornton Craven, Yorkshire. Presented by W. Gilbert- 
son. Esq. 
/, g. River Reed, Northumberland. 
h, i. Aberdeen. 
j, Jc. Aveton, Gifford River. 
l. Loch Tay. 
m. River Bann. 
n. Shetland. Presented by R. T. C. Scott, Esq. 
o. Britain, with pearls. 
p — r (jun.). Britain. 
3. Unio. 
Unio (pictorum), Retz. Diss. Phys. 16, 1788 ; Rrug , Journ. H. N, 
i. 17^2; Encyc. Meth. t. 247 ; Spengler, Skrivt . N. Selsk. iii. 
53, 1783; Schumacher, Essai, 137, 1817 ; Leach, MSS . 1818, 
Ann. 8f Mag. N. H. xx. 272. 
Mya (pictorum). Humph. Mus. Calonn. 1797- 
Unionea ( ), Rafin. 1815. 
Mysca (pictorum), Turton, Bivalves, 244, 1822 ; Swains. Malac. 
276, 378. 
Mysia (pictorum). Gray, Proc. Z. S. 1847, misprint (not Leach). 
Baphia, § 1. (pictorum), Meuschen, Mus. Gevers. 1787* 
Limnsea and Limnaeoderma (pictorum), Poli, Test. SiciL 
Limnium or Lymnium (pictorum), Oken, Lehrb. Naturg. 1815. 
Luticola (pictorum), Goldfuss , in Agass. Nomen. 1846. 
Unio (mytiloides), Swainson, Malac. 267, 1840. 
Cunicula (planulata), Swains. Malac. 267, 1840. 
Curricula (planulata). Gray, P. Z. S. 1847 (misprint). 
Ligumia (recta), Swains. Malac. 267, 1840. 
Theliderma (metanera), Swains. Malac. 267, 1840. 
Megadomus (gigas), Swains. Malac. 267, 1840. 
iEglia (ovata), Swains. Malac. 267, 1840. 
Calceola (calceolus), Swains. Malac. 267, 1840. 
Hemiodon (undulatus), Swains. Malac. 267, 1840. 
Niaa (ater), Swainson, Elem. 1837* 
Naidea (ater), Swainson, Malac. 267, 1840. 
Canthyria (spinosus), Swains. Malac. 267, 1840. 
Iridea (granosus), Swains. Malac. 267, 1840. 
Naia (corrugata), Swains. Malac. 267, 1840. 
Hyridella (australis), Swains. Malac. 267, 1840. 
Proptera, Eurynia, Elliptic, Plagiola, Obovaria, Truncilla, Am- 
