IREDALE & o'dONOGHUE : BKITISH NUDIBRANCHIATE MOLLUSCA. 217 



Family ARMINID^. 

 Genus Armina, Rafinesque, 1814. 

 Armina, Rafinesque Schmaltz, Precis decouv. trav. Somiol, p. 30, 

 (pref. June 3), 1814. 



Type here designated, A. tigrina, Raf. 

 Pleurophyllidia, " Meckel in Hammer Dis. Obs. Anat. Comp., 



1816 " : Deutsch. Arch. f. Physiol., vol. viii, p. 197, 1823. 

 Diphyllidia, " Cuvier," Otto, Conspec. Anim., pt. 1, p. 8, May 11, 

 1821 : ex Cuvier vernacular. 



armina loveni (Bergh, 1861). 

 Pleurophyllidia loveni, Bergh, Vidensk. Meddel. natur. Foren. 



Kjoben, 1860, p. 328, 1861. 

 Conch. Soc. List, p. 18 ; Eliot, p. Ill, pi. viii, figs. 8-10, 



p. 160. 



nOLOHEPATICA. 



Super-family PHANEROBRANCHIAT^. 



Family OKENIID.E. 



Genus Idaliella, Bergh, 1881. 



Idaliella, Bergh, Arch. f. Naturg. (Wiegm.), Jahrg. xlvii, pt. 1, 



p. 145, 1881. 



Type Idalia aspersa, A. & H. 



idaliella aspersa (Alder & Hancock, 1845). 

 Idalia aspersa, A. & H., Mon. Nudib. Moll. (Ray Soc), pt. 1, Fam. 1, 



pi. xxvi (reviewed Oct. 1), 1845 : CuUercoats. 

 Idalina (Idaliella) aspersa, A. & H., Conch. Soc. List, p. 19. 

 Idalia (Idaliella) aspersa, A. &; H. ; Eliot, p. 159. 



IDALIELLA iN^QUALis (Forbes & Hanley, 1851). 

 I(dalia) inwqualis, Forbes & Hanley, Hist. Brit. Moll. (pts. xli, xlii), 



vol. iii, p. 579, pi. yy, fig. 4, Sept. 1, 1851 : Zetland. 

 Idalina (Idaliella) incequalis, Forbes, Conch. Soc. List, p. 19. 

 Idalia (Idaliella) incequalis, Forbes, Eliot, p. 159. 



IDALIELLA PULCHELLA (Alder & Haucock, 1854). 

 Idalia pulchella, A. & H., Ann. & Mag. Nat. Hist., ser. ii, vol. xiv, 



p. 103, Aug. 1, 1854: St. Ives, Cornwall. 

 Idalina (Idaliella) pulchella, A. & H., Conch. Soc. List, p. 19. 

 Idalia (Idaliella) pulchella, A. & H. ; Eliot, p. 159. 



Genus Okenia, Menke, 1830. 

 OJcenia, Menke, Synops. method. Mollusc, ed. 2, p. 10, pref. April, 



1830 : ex Leuckart MS., as synonym of Idalia, Leuckart. 

 Okenia, Bronn, Ergeb. meiner naturh. ocon. Reise, vol. i, 1826 : n.n. 

 Idalia, Leuckart, Breves Animal, quor. Descr., p. 15, 1828. 

 Type by monotypy, I. elegans, nov. 

 Not Idalia, Hiibner, Verz. bekannt. Schmett., p. 149, 1820. 



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