198 40 



contents were composed of small, up to 2 mm long, pieces of a red Alcyonaria, and gray 

 lumps of a similar kind. 



The grayish yellow _ principal liver was short-conical, of a length of 5"5 mm , 

 hollowed on the fore side; its small cavity was filled by chymus. Quite separated from 

 this liver was found a little, plane-convex secondary liver of a length of 3 mm , with a 

 special efferent duct leading to the first stomach before the girdle of plates. 



The pericardium and the renal syrinx were as usual. 



The thin layer of the hermaphrodite gland, which, as to eolour, was scar- 

 cely to be distinguished from the liver, was provided with developed sexual elements. 

 The lengthy, narrow anterior genital mass had a length of é™ 11 , by a height of l mm , 

 and was whitish and slightly yellowish ; at the fore end of this mass the penis was found, 

 at the hinder end the seminal vesicle. This latter was pyriform, and contained but little 

 semen ; the efferent duct together with its wider end (vagina) was twice the length of the 

 vesicle. The short-pyriform bag of the penis had a height of O^ö™ 01 (with a lengthy 

 ganglion on its crown); the almost cylindric glans issuing from the bottom, projected 

 with the point from the genital aperture. The mucous-albuminous gland vas small. 



The genus Marionia has not hitherto been known from the Jndo-Australian Seas. 

 The form examined here, seems to be a new species; the M. occidentalis of the western 

 Atlantic (Buenos Ayres) shows also a green colour, but seems to differ from the pre- 

 sent form. 



Fam. Bornellidae. 



Comp. R. Bergh, I.e. 1892. p. 1051 — 1054. 



Bornella, Gray. 



Gray, figures of moll, animals. IV. 1850. p. 107. 



R. Bergh, neue Nacktschnecken d. Südsee. II. Journ. d. Mus. Godeffroy. Heft. VI. 1874. p. 95—102. Taf. I, 



Fig. 3-4. Taf. II, Fig. 30— 33. Taf. IV, Fig. 1-28. 



malacolog. Unters. (Semper, Philippinen) Heft. VII. 1874. p. 287— 30S. Taf. XXXVI— XXXIX. 

 — report on the Nudibranchiata. The Zoology of H. M. S. Challenger. Zoology. Vol. X. Part XXVI. 



1884. p. 34-43. PI. VII, Figs. 13-22; pi. VIII, figs. 1-13. 



Die Nudibranchien des Sunda-Meeres. Malacolog. Unters. Heft. XVII. 1890. p. 884— 889. Taf. LXXXV1II, 



Fig. 26-30. Taf. LXXXIX, Fig. 1—2. 



The genus Bornella has been provided with a series of species. Of the hitherto 

 mentioned species scarcely more than three can be kept up: B. digitata, Ad. et R., 

 B. calcarata, Mørch, and B. excepta, Bgh. The other never really examined species 



