— 410 — 



Drelssena Van Beneden. conlin. 



Gray 1840. Turton Man, ed. 2a p. 300. — genus 



Dreissenadarum. 

 MoRRrs 1843. Brit. foss. p. 87. 

 Conf. Fer. 1835. Bull. zool. p. 44. 

 = Congeria Partsch. 

 Dreissenadae Gray 1840 in Turton Man. ed. 2a p. 299. 

 Eiym. D r e i s s e n a . 



Familia Conchiferoruni Dimyariorum. Genera : Dreis- 

 sena , Congeria. 

 Drei»$^enidae Gray 1840. Syn. Brit. Mus. * (Agass. Nom.) 



vid. praec. 

 Dreissina G. B. Sow. jun. vid. Dreissena. 

 Drepanot^toma PoRRO 1836 in Guerin Magas. VI. 5. tab. 71. 

 et 1838. Malac. delhi prov. Com. * 

 Etym. d(>e/iavov, falx; OTOfia, os. 

 Genus ab Helice separatum. Typus novus: Helix 



nautiiiformis Porro. 

 Anton 1839. Verzeichn. p. 39. — subgenus Helicis. 



Pariter Hartmann 1840. Syst. Uebers. 

 Synon. Ilelicella sect. Lomastomae (spec.) Feruss. 

 Chloritis Beck. 

 Ilriessena Broxn in Jahrb. 1836. p. 120. vid. Dreissena. 

 Drillia Gray 1838 in Jardine Ann. Nal. Hist. I. p. 28. * 

 > Wiegm. Arch. 1839. 11. p. 229. 

 Eiym. ? 



Novum genus Pleurotomae affine. 

 Druiia BoLTEN 1798. Mus. (ed. 2a 1819. p. 39.) 

 Eiym. Drupus. 



Ad Purpuras referendum genus. Typicae species: 

 Purp. horrida Lamck. et Purp. rugosa Born. 

 Diivaueelia Leach teste Risso 1826. Hist. IV. p. 38. 

 Etym. Dicat. Duvaucel. *) 

 Novum genus Tritoniaceorum. 



2) Duvaucelia Rob. Desv. (1830.) genus Dipterorutn. 



