TRANSACTIONS OF WAGNER 

 1222 



TERTIARY FAUNA OF FLORIDA 



We are now in a position to take stock of some of the Boltenian names 

 before proceeding further. From Paphia Bolten, Sunetta and Meretrix have 

 been eliminated, leaving only species of the genus ordinarily called Tapes 

 .(Miihlfeld, 1811), which must retain Bolten's name. 



From Cytherea Bolten the subtraction of Codakia and Dosinia leaves only 

 species of the type of V. puerpera and granulata Gmelin and scripta Gmelin. 



From Venus Bolten the subtraction of Venus (typical), Meretrix, Tapes 

 (sp.), Tivela, and Egeria or Galatea leaves only species of the type of V. 

 islandica, lumens, castrensis, dione, and rostrata. 



In Megerle von Miihlfeld's " Essay at .a New System of Conchology," 1811, 

 a number of new names appear: Cuneus Megerle, based on Venus meroe L., 

 is a synonym of Sunetta Link; Tapes Megerle is the equivalent of (the elimi- 

 nated) Paphia Bolten; Chione Megerle includes such forms as V. cancellata 

 and V. gallina; Fimbria Megerle (a preoccupied name) was afterwards named 

 Corbis by Cuvier; Trigona Megerle, preoccupied in insects, is Tivela Link; 

 Orbiculus Megerle is a compound of Dosinia and Codakia Scopoli. 



Lamarck seems to have repented of using the somewhat indelicate name of 

 Meretrix, and in 1805 Roissy cites a genus Citherea " Lamarck" which is the 

 equivalent of Meretrix. In the " Annals du Museum" (vii., p. 132) Lamarck * 

 definitely substitutes the name Cytherea for Meretrix, which was afterwards 

 very generally dropped in favor of the new name. The Cytherea of Lamarck, 

 however, is not Cytherea Bolten, the latter having priority over the former as 

 well as over Meretrix. 



The next most important advance was made by Schumacher,* though a 

 number of the groups he segregated had been previously named. Anomalo- 

 cardia Schumacher was proposed for a group of Venerida typified by V. ftuc- 

 tuosa L. ; Mercenaria for the typical Venus Lamarck, 1799; Tapes Megerle 

 is adopted; Arctica is proposed for Venus islandica (L.) Miiller; Tridonta 

 for the group which had the year before been named Astarte by Sowerby, and 

 was to be named Crassina by Lamarck after Leach in the year following; 

 Lentillaria for Codakia Scopoli ; Meroe for Sunetta Link ; Cytherea Lamarck 

 is adopted and Venus, for which V. dione, V . circinata, and Dosinia exoleta are 

 cited as examples. The genus Circe is proposed for Venus scripta L. ; Trigona 

 is used for Link's Tivela; Antigona for a new species allied to Cytherea Bolten ; 

 Idothea, a name preoccupied in Crustacea, is given to Megerle's Fimbria. 



Schumacher's names reduce Cytherea Bolten to Veneridce of the type of 



* Essai d'un Nouveau Systeme des habitations des vers testaces, Copenhagen, 1817. 



