S8 .lOURNAI. OF CONCHOLOGY, VOL. 12, NO. 3, JULY, I907. 



several dee[) incisions, whicli are perliaps merely undulations. The 

 rhinophores are yellow. 



The intestines form an elongated compact bundle, and are entirely 

 yellow, as is also the buccal mass, which is not very large. The 

 pericardial lamellae are distinct ; the branchial lamellae beneath the 

 mantle edge are very numerous, and form a complete circuit, inter- 

 rupted only by the head. 



Placobranchus ocellatus Van Hasselt. 



Bergh, "Danish Expedition to Siam, Opisthobranchiata," 1902, 

 pp. 22-3, and references there quoted. 



Two specimens. The general colour is whitish, with a faint green 

 tinge on the dorsal surface ; there are black or dark-brown dots on 

 the sole of the foot, and a single line of black ocelli (only here and 

 there doubled or irregular) on the under-surface, just about the part 

 which may be considered to mark the division between the wings and 

 the body. There are six black ocelli on the forehead, l)ut no lighter 

 ocelli or other markings are to be seen, and there is no special 

 colour on the rhinophores or pericardium. 



This appears to be a variety of PL ocellatus, with unusually simple 

 coloration, unless the lighter markings have disappeared, which is 

 possible. 



Elysia faustula Bergh. 



Bergh, "Mai. Unter^.," Seinpers Rcisen, Heft iv., pp. 1S6-190; 

 Eliot "Nudibranchs from East Africa and Zanzibar," Proc. Zool. Soc., 

 1904, p.p. 295-6. 



Five specimens, all ample and foliaceous. If they could be spread 

 out flat they would measure from forty to fifty millimetres in length 

 and twenty to thirty in breadth. The ground colour varies from 

 white to yellowish-green, with a border round the wings and tips of 

 the rhinophores varying from yellowish- brown to black. On both the 

 upper and lower surfaces are spots which also vary from yellowish- 

 brown to black. On the lower surface they are smaller in the middle 

 and larger towards the edge of the wings, but on the upper surface 

 those in the middle are larger. The pericardium is distinct, ov'al, not 

 elongate, spotted but not specially bordered. The rhinophores are 

 large and distinctly auriculate. The raised veins on the back are very 

 clear and prominent. Three start from each side of the pericardium 

 and ramify, the lowest being more extensively branched than the 

 others. The end of the body is variously shaped, being more pointed 

 in some specimens than in others. 



The radula is of the usual ascoglossan form. In the specimen 

 dissected there are five teeth in the ascending series and seven in the 

 descending. These are followed by two teeth in process of detach- 

 ment from the row, and below lie about fifteen in a heap. The teeth 



