REPORT ON THE MARSENIAD.E. 3 



of Leach. In the earlier works of Gray 1 and of T. Brown, 2 the designation Lamellaria 

 (" Laminaria ") 3 seems to be used in this sense. The name " MarseniA," on the other hand, 

 which, under the circumstances, would be for many years little known outside of England,* 

 was first adopted by Oken, 5 and afterwards applied to the group by Wood, 6 Beck, 7 and others, 

 but more especially and consistently in my monograph. 8 Loven, who had formerly, 9 like 

 Fdrussac, 10 Johnston, 11 d'Orbigny, 12 and later Gray, 13 adopted the term Lamellaria, Mfcg., 

 with the other names appended as synonyms, afterwards u employed the title Coriocella, 

 Blainville, to designate the typical forms, and restricted the generic name Lamellaria to a 

 new and divergent genus. This proceeding had neither justification nor resulting benefit, 

 quite apart from the fact that Blainville had originally founded the genus on a faulty 

 characterisation, which, as Philippi 15 pointed out, was only applicable in Cuvier's corrected 

 version. The Coriocella? of Blainville are moreover not typical, and the name is therefore 

 hardly applicable to the perfectly typical forms. Menke's term Cryptothyra is to be 

 rejected as superfluous, while the name CJielinotus, given by Swainson to a form certainly 

 closely allied to the Coriocella nigra of Blainville, must, as a generic or subgeneric 

 designation, displace the misused and misleading term Coriocella. 



Various faunists (Delle Chiaje, Gould, Michaud, Audouin, &c.) gradually increased 

 the number of "species," but with the exception of Lov^n (loc. cit.) did almost nothing 

 to further the general or anatomical knowledge of the group. The first important contri- 

 bution towards this end was my monograph (1853), which treated of the genera Marsenia, 

 Chelyonotus, Marsenina, and Oncliidiopsis. Owing especially to the scanty material, very 

 much still remained, however, to be done to elucidate anatomical structure. My monograph 



1 London Med. Repos., 1821, p. 232 : A natural arrangement of Mollusca according to their internal 

 structure. 



2 Illustrations of the Conchology of Great Britain and Ireland, 1827. 



3 This term was revived by Clark (On the Conovulidse, &c, Ann. and Mag. Nat. Hist., 1850, ser. 2, vol 

 vi. p. 451). 



4 The term must have been known to Blainville, who investigated several new molluscs in the British 

 Museum, and instituted there his genus Gryptostoma. 



6 . Ms, 1823, vol. ii. p. 460. 



6 Ann. and Mag. Nat. Hist., 1842, vol. ix. p. 455, sp. 527. 



7 Amtl. Ber. 24' 6 Versamml. d. Naturf. u. A. in Kiel, 1846, p. 116. 



8 R. Bergh, Bidrag til en Monogr. af Marseniaderne, 1853, Kgl. Datiske Vidensk. Sehk. Skr. 5 R. Naturv. 

 og mathem. Afdel. iii. pp. 243-359, tab. i.-v. 



9 Loven, Index Moll. Scandin. occid. habit., 1846, p. 15. 



10 Tableaux sysWmat. des Anim. Moll., 1822, p. xvi. 



11 Mag. Nat. Histfi 1836, vol. ix. p. 229. 



12 Voy. dans l'Amer. m6rid., p. 403. 



13 Figures of Moll. Animals, 1850, vol. iv. p. 75.— Guide, 1857, vol. i. pp. 27 and 28 (Ermea). . 



14 Ofversigt k. Vetensk. Akad. Handl, 1847, p. 192. 



15 Philippi, Berichtigung von Berichtigungen, Sigaretus und Lamellaria. Archiv f. Naturgesch. , 1841, Jahrg. 

 vii., Bd. i. p. 343.— Enum. Moll. Sic, 1844, t. ii. p. 142. 



