IREDALE & o'dONOGHUE : BRITISH NUDIBRANCHIATE MOLLUSCA. 225 



CRIMORA PAPiLLATA, Alder & Hancock, 1862. 

 Crimora papillata, A. & H., Ann. & Mag. Nat. Hist., ser. iii, vol. x, 



p. 263, Oct. 1, 1862 : Guernsey. 

 Conch. Soc. List, p. 19 ; Eliot, p. 107, pi. ii, figs. 1-5, 



p. 153. 



[Genus Issena, nom. nov. 



IssA lacera, Abildgaard. Issa was introduced by Bergli (Verb, 

 k. k. zool.-bot. Gesell. Wien, vol. xxx, p. 645, 1880) to replace CoZ^ra, 

 Bergb, Proc. Acad. Nat. Sci. Pbilad., p. 112, 1880, but unfortunately 

 Issa bad been proposed anteriorly by Walker, Jouxn. Linn. Soc. 

 (Zool.), vol. ix, p. 198, 1867. We therefore propose Issena, nom. nov. 



Doris lacera, " Abildgaard," Eathke, Zool. Danica (Miiller), 

 3rd ed., vol. iv, p. 23, pi. cxxxviii, figs. 3-4, 1806 : Norway, is, 

 moreover, anticipated by Doris lacera, Cuvier, Ann. Mus. Hist. 

 Nat. Paris, vol. iv, p. 453, pi. i, figs. 1-3, Aug. 1804, given to 

 a different species collected by Peron. 



Bergh, Bull. Mus. Comp. Zool., vol. xxv. No. 10, p. 189, pi. ix, 

 figs. 3-11, Oct. 1894, proposed Issa lacera, var. pacifica : north-west 

 of Unimak Island, Alaska, 43 fathoms, and the varietal name will 

 now become the specific, Issena pacifica.] 



Genus Euphurus, Rafinesque, 1815. 

 Euphurus, Rafinesque, Analyse de la Nature, p. 142, 1815. 

 New name for " Tritonia, Lam." 



Type by monotypy, Doris clavigera, Miiller. 

 Tritonia, Lamarck, Syst. Anim. s. Verteb., p. 65, Jan. 1801. 

 Type by monotypy, Doris clavigera, Miiller. 

 Not Tritonia, Meigen, Nouv. Class. Mouches, p. 33, 1800. 

 Triopa, Johnston, Ann. Nat. Hist., vol. i, p. 123, April, 1838. 

 Tjrpe by original designation, Doris clavigera, Miiller. 



EUPHURUS CLAviGER (0. F. Miiller, 1776). 

 Doris clavigera, 0. F. Miiller, Zool. Dan. Prodr., p. 229, (pref. 



March 31), 1776 : Denmark. 

 Tergipes pulcher, Johnston, Mag. Nat. Hist. (Loudon), vol. viii, 



p. 490, fig. 59 in text, Oct. 1835 : Berwick Bay. 

 Euplocomus plumosus, Thompson, Ann. Nat. Hist., vol. v, p. 90, 



pi. ii, fig. 4, April, 1840 : Strangford Lough. 

 Triopa clavigera, Miiller, A. & H., Mon., Fam. 1, pi. xx, pt. 4, 1848 ; 



Conch. Soc. List, p. 19 ; Eliot, p. 152. 



Family iEGIRETIDiE. 



Genus .-^Egires, Loven, 1844. 



Mgires, Loven, Ofvers. k. Vet, Akad. Forh. (Stockh.), vol. i, p. 49, 

 March 20, 1844. 



Type by monotypy, Polycera punctilucens, Orbigny. 



