The Opisthobranchiata of South Africa. 63 



The form of the body oval ; the rhinophores rather large, the gill 

 formed of 8 rather low (simply ?) pinnate leaves ; the back quite even 

 with undulating broad brim, the frontal veil rather large. The 

 animal did not at first sight look like a Doriopsis. 



The central nervous system as usual. 



The glandula ptyalina large, brownish. The bulbus pharyngeus 

 with the gland, salivales (and the buccal ganglia) as usual, the more 

 brownish oesophagus rather short. The liver dirty- yellowish, sausage- 

 shaped, 6 mm. long by a breadth of 3, the cleft in the hinder end 

 3 mm. long. 



In the lobes of the thin layer of the hermaphrodite gland ripe 

 genital elements, the ampulla of its duct strong, yellowish white. 

 The anterior genital mass 4 mm. long by a height of 3 "5 and a thick- 

 ness of 2*5. The penis whitish ; the everted promiuent glans of a 

 diameter of 0*25 mm., covered with about 25 quincunx-series of 

 hooks of a height up to 0*08 ; the armature continued for a short 

 distance up into the vas deferens, where the number of series 

 seemed to be smaller ; the hooks weaker, with larger basal part of a 

 diameter of 0*04 mm.* 



4. Doriopsis, sp. 

 PL VIII., figs. 5-6. 



At Swart Klip (NE. J- N. 1 mile) an individual was taken, by 

 dredge from a depth of ten fms. and from a bottom of broken 

 shells (November 17, 1902). 



The contracted and very hardened specimen was 16 mm. long by 

 a breadth of 6 and a height of 5, the breadth of the foot 5 5 and 

 the length of the tail 5 5 mm. — The colour is now whitish, but had 

 very likely been grayish, the back and the sides still retaining 

 large patches of this colour ; the rhinophores and the gill whitish. 



The form as usual ; the head rather large, the rhinophores with 

 10-12 strong lamellae, and a small papilla at the top ; the back 

 quite even ; the gill, standing nearly on the middle of the back, con- 

 sisting of 6 pinnate leaves ; the brim of the back as well as of the foot 

 a little projecting ; the whitish penis (fig. 5) projected as a cylinder of 

 a height of 1 mm., and from its top the armed end of the vas deferens, 

 1-5 mm. long (figs. 5, 6) : the tail prominent beyond the end of 

 the back. 



The central nervous system as in other Doriopsides. 



* A dark-blue variety of the so varying D. nigra is known from the Southern 

 Japanese Sea (R. Bergh, Beitr. zur Kenntniss d. Japan. Nudibranchien, I. Verb, 

 d. k. k. Zool. Bot. Ges. in Wien, xxx., 1880, pp. 181-184). 



