GUDE : ox SOMK PKEOCCUPIED NAMES. 293 



occurring in the Miocene (Tortonian) strata of Bavaria. Bouillet' 

 having twelve years previously published a Paludina ovata which he 

 states forms beds several feet thick at Puy de Marman, Veyre, 

 Department Puy de Dome, and occurs iu a mucli older formation — 

 Oligocene (Stampian), I would suggest for the more recent form tlie 

 specific name Dunheri in lieu. Sandbergcr - placed it in the genus 

 Bithijnia, a view coinciding with ray own, and the sliell will therefore 

 bear the name Bithynia Dunkeri, nom. mut. 



The last species to require renaming is Cardmm stilcaiinum, 

 Deshayes,^ 1838, not Cardium sulcatinum, Lamarck,'' 1819. It is 

 somewhat remarkable that Deshayes in applying this specific name 

 overlooked the fact that it liad already been used by Lamarck for 

 another species, the more so since he himself edited a later edition 

 of Lamarck's work, vol. vi (containing C. sulcatinum) being dated 1835. 

 That the two forms are specifically distinct may at the outset be 

 assumed from the fact that Deshayes makes no reference to Lamarck's 

 specific name, an assumption which receives confirmation from 

 Lamarck's note to the effect that his species is allied to Cardium 

 sulcata})}, Lam. = C. ohlongutn, Chemn. 



A.ndrusov places the Crimean shell in the genus Didacna,^ and 

 I have much pleasui"e in coupling the name of the Russian savant 

 with Deshayes' species : Didacna Andrusnvi, nom. mut. 



^ Cat. Esp. Moll. Auvergne, in Ann. Sci. Acad. Sci. Clermont-Ferrand, 



torn, viii, p. 145 (1835), 1836. 

 - Land und Siissw. Conch. Vonvelt, 1875, p. 560, pi. xxviii, fig. 17. 

 ^ Mem. Soc. geol. France, vol. iii, p. 53, pi. ii, figs. 3-5. Miocene (Sarmatian- 



Pontian) : Kertch, Crimea. 

 ■* Anim. sans Vert., vol. vi, pt. i, p. 18. 

 ^ Mem. Acad. Imp. Sci., St. Petersburg, ser. Vlll, vol. xxv. No. 8, p. 22,1910. 



