20 Transactions of the South African Philosophical Society. 



those of the tropics. Somewhat better known are the following 

 species : 



1. Act. Pleii, Eang. 



M. atlant. occid. 



2. Acl. striata (Q. et. G.). 



M. africano -indie. 

 ' 3. Acl. cirrhifera (Q. et G.). 

 M. africano -indie. 



4. Acl. impexa, B. 

 M. phillipin. 



5. Acl. ocelligera, B. 

 M. Siamense. 



6. Acl. varicolor, B. 



M. indicum. 



7. Acl. pusilla, B. 



M. indicum. 



Acl. cirrhifera, Q. et G. 



Aplysia cirrhifera, Q. et G. Voy. de V Astrolabe, ii., 1832, p. 311, 



pi. 24, fig. 8. 

 Aclesia cirrhifera, Q. et G. Ed. v. Martens, Beitr. Meeresfauna 



d. Insel Mauritius u. d. Seychelles, 1880, p. 308. 

 Aclesia cirrhifera, (Q. et G.) Bgh., I.e., 1900, pp. 351-360, 



taf. xxix., figs. 28-31. 



PI. III., figs. 16-24 ; PI. IV., figs. 1-7. 



Two individuals were procured from the lagoon at Port Alfred, 

 five specimens caught at low- tide at Knysna along shore from jetty 

 towards village, one was procured at the mouth of Nahoon on 

 June 12, 1900, one more at East London in August, 1902. 



They were all of a very similar exterior ; but the colour of the 

 smaller was dark greenish gray, that of the larger blackish gray, 

 with small black dots ; the foot always yellowish gray. The largest 

 individuals were 8 cm. long, by a height and a breadth of 4 ; the 

 height of the rhinophores and tentacles about 7 mm. ; the length of 

 the gill-slit 1-2 cm. ; the breadth of the foot 3 cm. ; the length 

 of the tail 1*5-2 cm. The other individuals 5-7 cm. long. 



The four specimens anatomically examined had a length of 

 4-6-7 cm. by a breadth of 2-6-4 and a height of 2-5-3 ; the height 

 of the rhinophores and the tentacles 4-5 mm., of the papillae of the 

 back -5 mm. ; the length of the gill-slit 6-10 mm. ; the breadth of 

 the foot 1-5-2-7 cm., the length of the tail 1-1-3 cm. — The animals 

 were very soft in consistence. 



