Notarchus and Hexabranchus. 13 



10), A. ocellata Feuussac (described p. 74, pi. 24, f. 2—4), 3 A. Brom/niartii 

 Blainvillk (described p. 76), Bursatella leachii Blainville (described p. 78, 

 pi. 23, f. 8). 

 Savigny, J. C, Description de l'Egypte. Paris 1826. 



Bursatella savlgniaua (figured pi. 2, f. 2). 



Schweigger, A. F., Handbuch der Naturgeschichte der skelett- 

 losen Thiere. Leipzig 1820. 



N. indlcus (p. 745). 



Smith, E. A., Mollusca. In: Report of the zoolog. collections 

 made in the Indo-Pacific ocean during the Voyage of H # 

 M. S. "Alert" 1881—82. London 1884. 



Styloclieilus sp. (p. 90). 



Stimpson, W., Descriptions of some of the new Marine Inverte- 

 brata from the Chinese and Japanese Seas. In: Proc. Acad. 

 Nat. Sci. Philadelphia. 7, 1854 — 55. Philadelphia 1856. 

 N. cirrosus (described p, 378), N. lineolatus (described p. 378). 



Troschel, F. H., Bericht liber die Leistungen in der Natur- 

 geschichte der Molmsken wahrend des Jahres 1863. In: 

 Archiv fur Naturgeschichte. Jahrg. 30, Bd. 2. Berlin 1864. 



N. poly omnia Morch (p. 299). 



Vayssiere, A., Note sur l'existence d'une coquille chez le Notar- 

 chus punctatus. In: Journal de Conchyliologie. Serie 3. 

 Tome 22. Vol. 30. Paris 1882. 



N. punctatus (p. 271, pi. 11, f. 8). 



-, Recherches Zoologiques et Anatomiques sur les Mollusques 



opistobranches du Golfe de Marseille. Partie 1, Tectibran- 

 ches. In: Annales du Musee d'Histoire Naturelle de Mar- 

 seille. Zoologie. Tome 2. Marseille 1885. Abstr. in Journal 

 of the Roy. Microscop. Soc. (2) 5 (p. 624), London 1885 and 

 Journ. de Conch. Vol. 25 (p. 206). Paris 1885. 



iV. punctatus Philippi (described p. 75, pi. 3, f. 77, 85, pi. 4. f. 80 95). 



Bibliography of the Genus Hexabranchus Ehrenberg. 



Aisrauam, P. S., Notes on some Genera of Nudibranchiate Mol- 

 lusca, with Notices of a new Genus (Calycidoris). In: Ann. 

 Mag. Nat. Hist. Serie 4, vol. 18. London 1876. 



H. suezensls sp. now (described p. 137, pi. 0, f. 3, 3 a), H. pellucidutns 

 sp. nov. (described p. 136, pi. 6, f. 2, 2 a— c), H. praeterttu Kunn.. Doris 



