334 UNION [D^ 



Genus : 2. PSEUDANODONTA, Bourguignat. 



Etym. : — Gr. i/'tvSr/s false + Aiiodonta, a Molluscan genus. 



Type : — Anodonta complmiata (Ziegler MS.), Rossinassler. 

 (Selected by Westerlund, 1902. The original specimen 

 being lost its exact identity is uncertain, but it was near 

 to, if not identical with, the A. elongata of Hollandre.) 



(Anodonta, vett. auctt.) 



1876. Pseudanodonta, sect. 2 of Pseudodon : Bourguignat, 



Bull. Soc. Sci. phys. & nat. Toulouse, iii, 



p. 99. 

 1880. Pseudanodonta [as a genus] : Bourguignat, Mat. Moll. 



Aceph. Europ., p. 11. 

 1902. Pseudoanodonta, Bgt. : Westerlund, Rad Jugoslav. 



Akad., cli, p. 137. 



[*^* The genus was first announced as British by Dr. 

 Haas in June, 1910 (Proc. Malac. Soc. Lond., ix, 

 p. 109), but the following references suggest that 

 it had not been unobserved, though not recognized 

 as a distinct form : — 



Maton & Rackett's figure (Trans. Linn. Soc, viii, 1807, 

 pi. iii A, f . 4) of Montagu's Mytilus avonensis, which 

 they considered to be a variety of Anodonta anatina, 

 suggests a form of Pseudanodonta, and Bourguignat 

 comments (Mat. Moll. Aceph. Europ., 1881, p. 297) 

 on its resemblance to the Anodonta falax of Colbeau, 

 which bears a similar resemblance to Pseuanodonta, 

 but which Bourguignat retains in Anodonta. 



Brown's figure of Montagu's species (Illust. L. <& F.-W. 

 Conch. Brit., 1845, pi. xviii, f. 3) is quite different 

 and obviously represents a dumpy form of Anodonta 

 anatina. Bourguignat (op. cit., p. 304) leaves it in 

 that genus, but changes the trivial name to avonica. 



Brown's figure of a young Anodonta cygnea (Illust. 

 Conch. Brit., 1827, pi. xxvii, f. 4; ib., ed. 2, 1840?, 

 pi. xxviii, f. 4 ; and its repetition in his Illust. L. & 

 F.-W. Conch. Brit., 1845, pi. xi, f. 3) also suggests 

 a form of Pseudanodonta, but sufficient details are 

 lacking for a precise determination.] 



1. Pseudanodonta minima (Millet). 

 Etym. : — Lat. minimus, least. 



1833. Anodonta minima (Millet) : Millet, Mem. Soc. Agric. 



Angers, i, livr. 3, p. 241. 

 ?1835. Anodonta complanata, Ziegler: Rossmassler, Icon., i, 

 p. 112, f. 68. 



