NO. 1205. SYNOPSIS OF THE NAIADES— SIMPSON. 649 



"Anodonta truncata Kuster, Faun. Dalm., 1866, p. 131. 

 *Anodonta tunizana Morelet, J. de Conch., 1864, p. 156, 



^Anodonta viridis H. and A. Adams, Gen. Eec. Moll., II, 1857, p. 503, as of Lea. Lea 

 did not describe it. 



Genus COLLETOPTERUM Bourguignat, 1881. 

 (Type, Anodonta letourneuxi Bourguignat.) 

 Colletopterum Bourguignat, Lettres Malacologiques, 1881, p. 45. 



Shell inflated, thin, winged in front and behind, hinge arched, very 

 short, without teeth, but with a feeble lateral lamella shown in pro- 

 nounced relief; ligament internal. 



Animal unknown. 



COLLETOPTERUM LETOURNEUXI Bourguignat. 



Anodonta letourneuxi Bourguignat, Annales Mai., I, 1870, p. 76. 



*Anodonta {Colletopterum) letourneiixi Westerlund, Faun. Pal., II, 1890, Pt. 7, 



p. 310. 

 Colletopterum letourneuxi Bourguignat, Lett. Mai., 1882, p. 46; ' Bull. Soc. Mai. 



Fr., VII, 1890, pi. VI, figs. 1, 2. 



Servia, at Belgrade. 



COLLETOPTERUM PR^ECLARUM Bourguignat. 



Anodonta prceclara Bourguignat, Ann. Mai., 1, 1870, p. 78. 



' Anodonta (Colletoptermn) prceclara, Westerlund, Faun. Pal., II, 1890, Pt.7, p. 310. 



Colletopterum prwclarum Bourguignat, Lett. Mai., 1882, p. 46. 



Bulgaria, at Eutschuk. 



COLLETOPTERUM EXIMIUM Bourguignat. 



Anodonta eximia Bourguignat, Ann. Mai., 1, 1870, p. 80. 



* Anodonta {Colletopterum) eximia Westerlund, Faun. Pal., II, 1890, Pt. 7 p. 310. 



Wallachia at Giurgevo. 



COLLETOPTERUM TANOUSI Bourguignat. 



Anodonta tanousi Bourguignat, Ann. Mai., 1, 1870. 



* Anodonta {Colletopterum) tanousi Westerlund, Faun. Pal., II, 1890, Pt. 7, j). 311. 



Servia at Belgrade.^ 



Genus GABILLOTIA Servain, 1890. 

 (Type, Anodonta pseudodopsis Locard.) 

 GaUllotia Servain, Bull. Soc. Mai. Fr., VII, 1890, p. 296. 



Shell large, subsolid, subcompressed, more or less rhomboid gaping 

 behind; beaks low, with fine, broken, concentric sculpture; epidermis 



- 1 1 am wholly unacquainted with this genus. All the species are from the Danube, 

 and if the characters are accurately given it may possibly be a valid genus, though 

 Westerlund gives it subgeneric rank under Anodonta. It is more than likely, how- 

 ever, that all the so-called species are merely specimens of the well-known Anodonta 

 cygnea, having a dorsal wing which conceals the ligament, and something which 

 may be vestiges of lateral teeth. Such examples occur among Anodontas in other 

 parts of the world. 



