EITLALIA VIRIDIS. $7 



1890. Eulalia viridis, Malaquin. Annel. Boulon., p. 43. 



„ ,, ornata, idem. Ibid., Rev. Biol. Nord., Tav. iii, p. 99. 



1891. ,, viridis, Hornell. Trans. Liverp. Biol. Soc, vol. v, p. 246. 

 1893. ,, ornata, Levinsen. Yidensk. Ud. 'Hanchs/ p. 327. 



1897. „ aurea, Gravier. Bull. Sc. Fr. Belg., t. xxix, p. 309, pi. xvi, f. 2—6. 



„ ,-, viridis, idem. Ibid., p. 308, pi. xvi, f. 16; pi. xviii, f. 13 — 15; pi. xxi, f . 2, 3 ; 



pi. xxii, f. 3 — 6. 



1903. „ „ Mcintosh. Mar. Invert. S. Africa, vol. iii, p. 34. 



1904. „ ornata, Allen. Journ. M. B. A., n.s. vol. vii, p. 223. 

 „ ,, aurea, idem. Ibid., p. 223. 



1905. „ viridis (= E. virens, Ehlers, and E. guttata, Clap.), Grseffe. Arbeit. Zool. Stat. Triest, 



xv, p. 325. 



1906. „ „ De St. Joseph. Ann. Sc. Nat., 9 e ser., t. iii, p. 224. 



Habitat. — Abundant under stones in rock-pools and other places near low water- 

 mark and in the fissures of shelving rocks about half tide level, where groups of five or 

 six may be found, and also under tangle-roots at St. Andrews, as well as all round the 

 British shores, from Shetland to the Channel Islands. It also ranges to deeper water, 

 as off the Bell Bock (E. M.), and in Galway Bay (Dr. E. P. "Wright). 



Shores of France (De St. Joseph) ; Faroe (Willemoes-Suhm) ; Greenland (O. F. 

 Miiller and CErsted) ; Madeira and Canaries (Langerhans) ; South Africa, col. Gilchrist 

 (Mcintosh); Behring's Sea (Marenzeller) . 



Head bluntly conical and pale throughout. Eyes two, of moderate size, black, and 

 occasionally an additional speck occurs external to either, probably due to brownish- 

 green pigment deposits. The latter can with difficulty be detected in spirit-preparations. 

 Tentacles subulate, slightly tapered ; median tentacle similar ; tentacular cirri greenish, 

 four on each side. The first pair is short, somewhat lanceolate, tapered, and attached 

 to the buccal segment (one on each side) ; the second and third which are longer are 

 fixed to the succeeding segment, whilst the fourth springs from the third body-segment, 

 and beneath is a modified foot with a few bristles, and an ovate ventral cirrus. 



Body linear, If to 4 in. in length, rounded dorsally and flattened ventrally, slightly 

 tapered anteriorly and more distinctly so posteriorly, and terminating in two lanceolate 

 and somewhat darker caudal cirri. The inner curve of the caudal styles is longer than the 

 outer. Colour of a rich deep green or grass green, paler in the region of the proboscis. 

 The lamellae are tinted of the same rich green, with a darker portion near the base, and 

 in some males are pale olive. In others each segment shows dorsally two dark belts — 

 narrower in the middle, broader externally — each being interrupted by a dark spot. 

 When ova are present in these varieties the posterior half has the ground-colour of a 

 deep green. The ventral surface is marked by a median moniliform line of dark olive, 

 supplemented posteriorly by a dark touch at each foot. A variety from the tangle-roots 

 of Bressay Sound is deep yellow, duskier on the dorsum, which, as in the previous form, 

 has two brownish lines, on each side of a central stripe. A lateral border of brown 

 also occurs on each side. The lamellae and under surface are yellow. Others from the 

 Outer Hebrides are greenish-yellow, yellowish-orange, or grass-green dotted with minute 

 black grains, and with a darker line at each segment-junction, while a dull madder-brown 



65 



