The Opisthohranchiata of SoutJi Africa. 41 



Krauss, and with respect to the shell, the elements of the mandibles 

 and to the lingual plates, the form here examined agrees with the 

 figures given by Vayssiere. On the other hand the " Pleurobranchus 

 (Oscaniella) grcmulatiis, Krauss," in my Monograph, '■' founded on a 

 specimen purchased as belonging to the form of Krauss, is quite 

 diflerent, and does not even belong to the Berthellse. 



Berthella granulata (Krauss), var. 



A specimen was procured from Hout Bay by dredge, December 

 22, 1897, resembling the above. 



It had a length of 3 cm. by a breadth of 2 and a height of 1"5 ; 

 the breadth of the frontal veil was 11 mm., the length of the some- 

 what flattened gill 18 by a breadth of 4, and the breadth of the foot 

 16 mm. The animal was of a uniform grayish colour, no white 

 punctuation being visible on the back. 



The gill with about 25 pairs of lamellae. 



The mouth tube 3 mm. long. The bulbus pharyngeus 5 mm. long 

 by a breadth of 2-5 and a height of 3-5 ; the elements of the yellow 

 mandibles merely 0-14 mm. long by a breadth of 0-05 and a height 

 of 0-05 ; otherwise quite as in the form above. The plates of the 

 tongue as above, reaching a height up to 0-28 mm. 



Pour smaller (15-17 mm. long) individuals were procured at 

 Gordon's Bay (in False Bay) at low tide. Their mandibles and rasp 

 were quite similar to those of the other individuals, only that their 

 elements were much smaller. 



NUDIBRANCHIATA. 



NUDIBRANCHIATA HOLOHEPATICA. 

 DOEIDID^ CEYPTOBEANCHIAT^. 



AECHIDOEIDID^. 



E. Bergh, System der nudibr. Gasteropoden. Malacolog. Unter- 

 such., iii. (xviii. Heft). 1892, pp. 1092-1094. 



Archidoris, Bgh. 

 E. Bergh, I.e., p. 1092 ;— /.c, 1905, p. 93. 



* L.c, pp. 112-115, taf. ix., figs. 17-22. 



