296 SIR C. ELIOT ON NUDIBRAKCHS [NoV. 29, 



recorded from the Philippines, The specific characteis appeal' to 

 be the coloration, the planarian-like shape, and the elongate 

 smooth teeth. 



Elysia marginata Pease. (Plate XVI. fi^'s. 7 & 8 ; and Plate 

 XVII. fig. 18.) 



[Pease, Amer, Journ. of Conchology, 1871, vol. vi. p. 304; cf. 

 Bergh, Jonr. Mus. Godeffroy, Heft ii. 1873, p. 80, on Elysia 

 nigrocincta.'\ 



The following are notes on living specimens captured at 

 Zanzibar : — 



1. "Extreme length 1*5 cm. General colour a dull green, 

 but on the surface are opaque black and white spots. The 

 tentacles and edges of the wings are bordered with orange-yellow,, 

 white, and on the extreme edge black. The white line is irregular. 

 Internally the edges of the wing are blotched with white. Each 

 black spot has a corresponding orange spot just beneath." 

 {Vide figures 7 & 8, PL XVI.) 



2. " In a second specimen the orange line I'ound the wings was 

 much broken, perhaps a step towards its disappearance." 



3. " Rather moi^e than an inch long, when fully extended.. 

 Tentacles and wings edged with a double border of orange and 

 black, which is interrupted at the neck. Whole body spotted 

 with small black flecks. Head and aurifoi'm tentacles very large. 

 Pericardial bulb prominent. Inside of wings not striated, but 

 the veins can be seen beneath the skin." 



4. " Green, without black spots, but wings bordered with a 

 double line of orange and black. Length about one inch." 



Unfortunately, only the second and fourth of these specimens 

 have been preserved. 



As preserved, the latter is 1 1 mm. long and 6 high, the wings 

 being raised, not spread out, but applied to one another. The 

 colour is olive-green : the borders have disappeared, but the 

 outside of the wings is covered with numerous yellowish-white 

 spots, and there are a few inside. The tentacles are short and 

 thickish, with tiaces of black about the groove. The wings are 

 rather thick, not much indented at the edges, and the posterior 

 expansion is not ample. The pericardial pi-ominence is distinct, 

 and the anus lies to the right side of it. The inside of the wings 

 is smooth and does not bear ridges, but where the animal is 

 sufficiently thin to be transparent, veins can be seen radiating^ 

 from the pericardivim. 



The foot is not distinctly divided from the body, and the front 

 part is hardly difierentiated from the rest. The radula consists 

 of 14 teeth, and there are about 12 more of very varying 

 sizes lying in a heap. The teeth are as in Bergh's plates of 

 B. nigropunctata (1. c. pi. xi. fig. 10* and pi. xii. 1), but seem 

 somewhat more slender. There is no trace of denticulation. 



The second specimen is 7*5 mm. long, 7 broad when the wings are 



* There seems to be a mistake in the explauation of this plate, figs. 13-2& 

 apparently referring to Cyerce and not to JE. nigropunctata as stated. 



