8 
THE VOYAGE OF H.M.S. CHALLENGER. 
1841. Wucleobranchiata, d’Orbigny, Sagra’s Hist. Cuba, Moll., vol. i. p. 93. 
1841. Heteropoda, Cantraine, Malacol. Medit., p. 35. 
1841. Nucleobranchiata, Reeve, Proc. Zool. Soc. Lond., p. 74. 
1842. ,, id., Conch. Syst., vol. ii. p. 55. 
1842. ,, d’Orbigny, Pal. frang. Terr. Cret., vol. ii. p. 16. 
1843. ,, Forbes, Report Brit. Assoc., p. 132. 
1843. Heteropoda, Gravenhorst, Vergleich. Zool., p. 65. 
1843. Heteropoden, Oken, Lehrbuch Naturphil., ed. 3, p. 459. 
1845. Nucleobranchiata, Geinitz, Grundriss der Verstein., p. 317. 
1845. ,, Catlow, Conch. Nomencl., p. 116. 
1845. Heteropoda, Gravenhorst, Das Thierr. nach d. Yerwandt., p. 33. 
1847. ,, Loven, Ofversigt k. Vetensk.-Akad. Forhandl., p. 191 (Dentition). 
1850. Heteropods, Johnston, Introd. Conch., pp. 106, 118, 119. 
1850. Nucleobranchiata, Jay, Cat. Shells, ed. 4, p. 114. 
1852. Heteropoda, Huxley, Ann. and Mag. Nat. Hist., vol. x. p. 455 (Anatomy). 
1852. Heteropodes, Souleyet, Voy. “Bonite” Zool., vol. ii. p. 289. 
1853. „ Verany, Journ. de Conchyl., vol. iv. p. 381. 
1853. Heteropoden, Gegenbaur, Zeitschr. f. wiss. Zool., Bd. iv. p. 335 (Anatomy). 
1853. Heteropoda, Philippi, Handbuch Conch., p. 281. 
1854. Heteropoden, Leuckart, Zool. Untersuch., Heft iii. pp. 3-68. 
1854. Nucleobranchiata, Woodward, Man. Moll., pp. 197, 451. 
1854. Heteropoden, Gegenbaur, Zeitschr. f. wiss. Zool., Bd. v. p. 113 (On the Excretory 
Organ). 
1855. „ id., Untersuch. Pteropoden und Heteropoden, pp. 101-185, 213. 
1856. ,, Krohn, Archiv f. Anat. u. Physiol., pp. 515-522 (Development). 
1856. Heteropoda, Troschel, Gebiss d. Schneck., vol. i. pp. 39-46. 
1857. ,, Gray, System. Arrang. Moll., p. 131. 
1857. Heteropoden, Krohn, Muller’s Archiv f. Anat. u. Physiol., p. 466 (Development). 
1858. Heteropoda, Owen, Encycl. Brit., vol. xv. p. 375. 
1860. Nucleobranchiata, Reeve, Elements Conch., vol. ii. p. 42. 
1860. Heteropoden, ^ Krohn, Beitrage Entwick. Pterop. und Heterop., p. 4. 
1866. Heteropoda, Keferstein, Bronn’s Thierreich, vol. iii. pt. 2, pp. 809-852. 
1869. Heteropoden, Boll, Beitrage vergl. Histiol. Moll., pp. 6, 57, 75, 97. 
1873. „ Weinkauff, Cat. Europ. Meer. Conch., p. xiii. 
1876. Heteropodes, Fol, Arch. d. Zool. Exper., vol. v. p. 105, pi. 1-4 (Development). 
1876. Heteropoden, Claus, Archiv f. mikfosk. Anat., vol. xii. p. 103, pi. x. (On the 
Organ of Plearing). 
id., op. cit., vol. xv. p. 341, pi. xxi. (On the Acoustic Apparatus 
in the Organ of Hearing). 
1878. 
