144 OKHAMANDAL MARINE ZOOLOGY REPORT 



dite gland is in two divisions which are united below the posterior parts of the 

 alimentary organs, but rise up above them on either side. It consists of large, 

 clear, pinkish packets of follicles. The central nervous system is much as in 

 Bergh's figures of Janolus australis (Challenger Report, 1884, PI. IX. fig. vi.). 

 The eyes are stalked. 



In many ways this animal resembles A. rwvozealandica and the two may even 

 be varieties of one species. But as preserved they are not very similar in appearance ; 

 the colour is not the same and the cerata and rhinophores are smaller in this species. 



Pteraeolidia semperi, Bergh. 



See Bergh, Beitr. zur Kennt. der Aeolidiaden, iii. p. 22, and Malac. Unlersuch. i. p. 18 (1870), under 

 Flabellina; Eliot, Proc. Zool. Soc. 1903, pp. 255-6. 



Five specimens from Kiu, Okhamandal. They are coiled up, but are about 

 40-50 mm. long. The colour as preserved has become a transparent yellowish-white, 

 but traces of red and green can be seen. The shape is slender and elegant. There are 

 from fifteen to twenty groups of cerata which are not at all caducous. The anterior 

 angles of the foot are produced and deeply grooved. The oral tentacles are large ; 

 the rhinophores small, stout, and lamellated. The dorsal margin is not marked by a 

 ridge. 



In the specimen dissected the radula consists of a single row of eighteen teeth, 

 bearing eight denticles on either side of the central cusp. The cutting edge of the 

 jaws is armed with many rows of denticles. 



PlercBolidia semperi is recorded from the Philippines, Zanzibar, and Japan, and 

 is probably generally distributed in the Indo-Pacific. It is a beautiful creature when 

 alive, with a complicated coloration which produces a general effect of purple with a 

 greenish silvery glaze. 



Elysia grandifolia, Kelaart. 



Kelaart, Ann. and Mag. Nat. Hist. 1859, vol. iii. p. 493 ; Eliot, Proc. Zool. Soc. June, 1906, p. 689. 



Seven specimens from Kiu. The largest are about 30 mm. long and 20 mm. 

 broad. The colour is somewhat variable, but the best preserved specimens indicate 

 that it was olive green, with a very distinct border to the wings and rhinophores which 

 is now white but shows signs of having been yellow. This border is accompanied on 

 the outside by a second thinner line of black, very distinct where it occurs, but often 

 interrupted and in one specimen entirely absent. The head is large, the tail long and 

 pointed. The pericardia! prominence is of varying shape, but generally elongate. The 

 radula of the specimen examined had eight teeth in the ascending series, twelve in the 

 descending, and about thirty in the heap of various sizes. The lower edge of the teeth 



