— 595 — 



Vrieoiin MiiHLF. 1811. Entw. p. 55. Cf. Blainv. 1828. Dict. 

 sc. nat. tom. 55. p. 289. et Desh. Enc. meth. III. 

 p. 1047. 

 Etym. TQiytovos, triangulus. '*) 

 A Venere disjunctum genus. Typus: Cytherea mac- 



troides Chemn. 

 Adoplat 8cHUM. 1817. Ess. p. 153. injuncta Galatea, 

 Gray 1842. Syn. Brit. Mus. p. 74. 91. - genus 



Veneridarum. 

 Synon. Tivela Link. ? 

 Trigonella Conrad. 

 Trisoiin PerryISII. Conchol. * teste Feruss. 1820. Journ. 

 de phys. tom. 90. p. 285. 

 A Scalariis segregatum genus. ") 

 Triisonaeen Brow.n 1833. The Conch. Tex(-l)Ook. * ed. VI. 

 1845. p. 138. 

 Etym. Trigonia. 



Familia Dimyariorum. Genera : Trigonia . Castalia. 

 Similiter Reeve 1841. Proc. Zool. Soc. p. 75. et 

 Conch. syst. I. p. 112. — emissa Castalia. 

 Sow. jun. 1842. Conch. Man. ed. 2a p. 277. — 



unicum genus: Trigonia. 

 Catlow 1845. Conch. Nomencl. p. 55. 

 = Trigonea Lamck. 

 Trisouata (Lamck.) Sow. jun. 1839. Conch. Man. p. 107. 



et 1842. ib. ed. 2a p. 277. vid. seq. 

 Trigonea (les Trigonees) Lamck. 1819. Hist. VI. 1. p. 60. 

 (ed. 2a VI. p. 514.) cf. praec. 

 Etym. Trigonia. *") 



Familia Dimyariorum lamellipedium. Genera : Tri- 

 gonia, Castalia. 



78) Trigona Jurine (1807.) genus Hyiaenopteroruni. 

 Trigona Latr. (1817.) seetio Crnstaceoruni brachyurorum. 



79) An potius a Cancellariis? ex typo Cancellariae trigonostomae? 



80) Trigonea Lamck. (1818.) divisio Crustaceorum homobran- 

 chiorum. 



