The Opisthohranchiata of Soutli Africa. 37 



on the right side partly covered by the kidney, on the upper side and 

 on the posterior end partly by the hermaphrodite gland, in front by 

 the gland, salivales. 



The kidney whitish gray, 7 mm. long by a breadth of 6. 



The hermaphrodite gland white, 9 mm. long by a breadth of 3 and 

 a thickness of 1"4 ; in the predominant male follicles bundles of 

 zoosperms, in the female less developed eggs. The white somewhat 

 globular anterior genital mass of a maximum diameter of 2-25 mm. 

 The hermaphrodite duct long, thin, forming many windings ; on the 

 mass in front the sperm duct makes a clew of windings ; the prostata 

 somewhat applanated, roundish ; the praeputium of the penis thin ; 

 no cones were detected on the glans. 



This is certainly specifically different from the typical form, and 

 constitutes a connecting link between Oscaniopsis and Pleuro- 

 branchaea. 



OSCANIELLA, Bgh. 



R. Bergh, DiePleurobranchiden, I.e., v., 3, 1898, p. 94 (-115).— Die 

 Opisthobranchiaten der Siboga Expedition, 1905, pp. 58-66. 



The Oscaniellie are intermediate between the genera Oscanius and 

 Pleurobranchus. 



They belong to the warmer regions of the seas, especially to the 

 Indian and Pacific Ocean. 



OSCANIELLA NIGEOPUNCTATA, Bgh. n. sp. 



PI. IV., figs. 22-26 ; PI. XL, figs. 9-18. 



One specimen was procured off Cape Infanta by tow-net. It was 

 rather contracted and bent together. 



In its present state the length is only 22 mm. by a breadth of 16 

 and a height of 12. Examined more closely the breadth of the brim 

 of the back was 6-8 mm. ; the length of the rhinophores 5, of the 

 tentacles 3 mm. ; the length of the gill 8 mm. by a breadth in front 

 of 4 ; the breadth of the foot 14 mm., of its brim 5; the length of the 

 tail 9 and of its gland about 4 mm. — The general colour of the animal 

 was yellowish ; the back covered all over with somewhat darker 

 scarcely prominent, sometimes nearly confluent, roundish or poly- 

 gonal areas of a diameter up to 3"5 mm. ; on the anterior and 

 posterior ends of the back, as well as towards its sides and especially 

 on the brim, the areas show a very pronounced black centre (fig. 9). 

 On the under side of the brim the dark areas shone distinctly through. 

 Black spots were scattered over the brim of the foot as well as on the 

 tail. The intestines shone through the skin nowhere. 



