TRIBE II. AEOLIDOIDEA. 



Genital duct diaulic, the male and female openings con- 

 tiguous. Liver ramified, extending into the latero-dorsal integu- 

 mentary papillae. Pharyngeal bulb bearing a pair of lateral 

 mandibles. 



Family AEOLIDIADAE. 



Body slug-like, dorso-lateral papillae spindle, or club shaped, 

 each terminating in a cnidosac armed with nematocysts. Head 

 bearing a pair of simple tentacles, and a pair of simple or perfoliate 

 rhinophores, non-retractile into sheaths. Foot elongate, the ante- 

 rior angles frequently prolonged into tentacles. 



Subfamily AEOLIDIANAE. 



Body somewhat depressed or subdepressed. Dorsal papillae 

 more or less compressed. 



Masticatory margin of mandibles smooth or nearly so. 

 Radula uniserial, the teeth wide, pectinate. 



Penis unarmed. 



Genus SPURILLA, Bergh, 1864. 



Spurilla, Bergh. Anatomiske Bidrag til Kundskab om Aeoli- 

 dierne. K. Dansk. Vidensk. Selsk. Skr., 5te Raekke, 

 Naturvid. og Math. Afh., VII, 1864, p. 205, Tab. VB. 

 Bergh, Beitraege zur Kenntniss der Mollusken des 

 Sargassomeeres. Verh. d. k. k. zool.-bot. Gesellschaft 

 in Wien, XXI, 1871, p. 1283. Bergh, Beitraege zur 

 Kenntniss der Aeolidiaden, IV, Verh. d. k. k. zool.-bot. 

 Ges. in Wien, XXVI, 1877, P- 758-7 61 - Trinchese, 

 S. Anatomia e Fisiologia della Spurilla neapolitana. 

 Memorie dell'Accademia delle Scienze dell'Istituto di 

 Bologna, T. IX, Ser. Ill, 1878, p. 405-430. Bergh, 

 Beitraege etc., VII, 1. c. XXXII, 1882, p. 12-19. 

 Bergh, Beitraege etc., VIII, 1. c. XXXV, 1885, p. 26- 

 27. Vayssiere, A. Recherches zool. et anat. sur les 

 Mollusques Opistobranches du Golfe de Marseille, II. 

 Annales du Musee d'Histoire Naturelle de Marseille, 

 Zoologie, III, 1888, p. in. Supplement, Ibid, VIII, 

 1903, p. 86. 



