— 126 — 



IViiciila Lainck. contin. 



Genus Acephalaeorum ab Arca segregatum. Typus: 



Arca nucleus L. 

 Cuv. 1800. Anat. comp. * et 1830. R. a. ed. 2a (ed. 

 Voigt. 111. p. 481.) — subgenus Arcae. 

 Pariter Schweigg. 1820. Naturg. p. 713. 

 RoissY 1805. MoU. VI. p. 408. 



Lamck. 1809. Phil. zool. et 1819. Hist. VI. 1. p. 57. 

 (ed. 2a VI. p. 502.) — genus Arcaceorum. 

 Pariter Feruss. 1821. Tabl. syst. p. XLL 

 Latr. 1825. Fam. nat. 

 Rang 1829. Man. p. 288. 

 Menke 1830. Syn. ed. 2a p. 103. 

 Desh. 1832. Enc. meth. IIL p. 632. 

 Bronn 1835. Leth. (ed. 2a p. 369. 929.) 



F. A. RoM. 1836. Verst. Ool. p. 98. 

 Phil. 1836. Moll. Sic. L p. 63. 

 PuscH 1837. Pol. Palaont. p. 62. 



G. B. Sow. jun. 1833. Conch. III. num. 14 

 — 16. * 



Reeve 1841. Conch. syst. I. p. 108. 



G. B. Sow. jun. 1842. Conch. Man. ed. 2a 



p. 204. 

 PoT. et MicH. 1844. Gal. II. p. 119. 

 Catlow 1845. Conch. Nom. p. 53. 

 Nyst 1846. Foss. Belg. p. 218- 

 Hanley 1846. II). cat. IL p. 167. 

 J. Sow. 1817. Min. Conch. tab. 180. 

 Gray 1821. Lond. Med. Repos. * — genus Lepto- 



podum. 

 Blainv. 1824. Dict. sc. nat. tom. 32. p. 322. et 



1825. Mal. p. 536. — genus Polyodontorum. 

 G. B. Sow. 1824 (?). Gen. Sh. fasc. 17. * — genus 

 Mactraceorum. 



Pariter Say 1830. Amer. Conch. (ed. Chenup. 19.) 

 Flem. 1828. Brit. Au. p. 382. 401. — genus Arca- 

 darum. 



