— 526 ~ 



Hemicyeloiiosta Desh. contin. 



Novuin genus Mactraceorum. 

 = Cardilia Desh, 

 lIeniicyclo.«^tera Bronn 1838. Leth. p. 806. errore calami. 



= liemicyclonosta Desh. 

 Hemicyclostoiiia Blainv. 1818. Dict. sc. nat. tom. 10. p. 

 216. Tabl. 

 Etym. i]/i(ixvxlog, semicirculus; oco/ita, apertura. 

 Schismobranchiorum famiiia. Genera, Nerita, Natica, 



Neritina, Theodoxus, Chthon, Velates. 

 Blainv. 1824. Dict. sc. nat. tom. 32. p. 237. et 1825. 

 Malac. p. 442. — quarta famiba Asiphonobran- 

 chiorum. Genera: Natica, Nerita, Septaria (1825 

 Navicella). 

 = Neritacea Lamck. 

 Hemifusus Swains. 1840. Malac. p. 91. 308. 



Etym. Vocabulum hybridum: jj/.uov, semis; Fusus. 

 Genus Fusinarum. Typus: Fusus colosseus Lamck., 

 vel F. morio Linn. 

 = Pugilina Schum. 



Hemiloma Rafin. 1820. Ann. of nat. L * > Isis 1821. 

 p. 361. 

 Efym. jj/itiov , semis; Xcdf.ta, margo. 

 Genus Helicidarum. 

 Hemimactra Svvains. 1840. Malac. p. 369. Conf. G. B. 

 Sow. jun. Conch. Man. ed. 2a p. 160. 

 Eiym. 7J/tiov , semis; /laxtQa, Mactra. 

 Subgenus Mactrae. Typus : xMactra solidissima 

 Chemn. 

 = Spisula Gray. 

 Hemimitra Swains. 1840. Malac. p. 199. 340. 

 Etym. ?j/itiov , semis; ftiTQa, mitra. 

 Subgenus Paludomi, ex typo novo. 

 Hemiodon Swains. 1840. Malac. p. 287. 381. Conf. G. B. 

 Sow. jun. Conch. Man. ed. 2a p. 160. 

 Ety?n. ij/tiov, seinis; odovg, dens. 



