30 Transactions of the South African Philosophical Society. 



•certainly been darker when alive) ; the under side of the free part of 

 the anterior shield, the neck under it and the sides of the body 

 blackish, the margins of the foot-lobes on the hinder wings blackish 

 on their inside (fainter on their outside) ; the large gill white ; the 

 foot grayish, black at its anterior end. 



The form as usual ; the fore shield rather long ; the wing-like lobes 

 of the hinder shield projecting downwards with the point turned 

 somewhat inwards ; the right wing seemed somewhat larger than 

 the left ; no flagellum. The whole of the upper side of the animal 

 quite smooth. The large gill projects nearly quite free from the gill 

 cavity; it is 8 mm. broad by a height of 6 mm., composed of 10 

 large tufts of lamellae, its end a little rolled up. 



The shell quite membranous with a faint touch of yellowish, only 

 the indistinct rolled up small nuclear part a little calcified ; the large 

 winding did not seem to project towards the root of the right wing ; 

 the length of the shell 13 by a breadth of 7 mm. 



The mouth tube 6 mm. long, black on the outside as well as on 

 the inside. The hulhus pharymjeus 14 mm. long by a height of 9 

 and a breadth of 8 mm., yellowish white on the outside and the 

 inside, of the usual rounded prismatic form and of the usual 

 structure ; the walls of the arrow-formed cavity of a thickness 

 of 25-3 mm. 



The liver yellowish gray. 



The penis yellowish, black in front. 



This form is perhaps specifically different from the other hitherto 

 described. 



NOTASPIDEA. 



PLEUEOBEANCHID^. 



R. [Bergh, Malacolog. Unters. v. 1897-98, pp. 1-158, 371-380, 

 taf. i.-xii. 



PLEUROBRANCH^A, Leue. 

 R. Bergh, System, I.e., p. 4 ( -51).— /.c, II., 1905, pp. 47-49. 



1. PLEUROBRANCHiEA CAPENSIS, VaySS. 



Vayssifere, Monogr. de la Pam. des Pleurobranchid6s, 2 partie. 



Ann. des sc. nat., 8 ^S., t. xii., 1901, pp. 46-49, pi. iv. 



figs. 232-237. 



PI. IV., figs. 8-11. 

 A notice of the locality, where 19 individuals of this form had 



