EULALIA BILINEATA. 51 



along the base of the feet, and in some a faint, interrupted double line occurs in the 

 middle. Ripe females are of a fine pea-green, a faint, interrupted double line extending 

 along the middle. On the other hand, the ripe males are whitish-yellow and the posterior 

 region of the body is enlarged. At the base of each foot dorsally is a dark speck. The 

 dorsal cirrus is ovato-lanceolate, and the ventral has a similar shape. It (ventral) is not 

 so prominent as the setigerous process, which bears bristles having the dilated ends of the 

 shafts distinctly spinous. The shape of the foot approaches that in E. trilineata. 



Synonyms. 



1840. Phyllodoce bilineata, Johnston. Ann. Nat. Hist., iv, p. 227, pi. vi, f. 7 — 10. 



„ Grnbe. Earn. Anne]., pp. 56 and 129. 



„ Johnston. Cat. Brit. Mns., p. 177, pi. xvi, f. 7 — 10. 



„ De Qnatrefages. Annel., ii, p. 137. 



„ Malmgren. Nord. Hafs-Annul., p. 99, Tab. xiii, f. 26. 



„ idem. Annul. Polych., p. 25. 



„ Mcintosh. Ann. Nat. Hist., ser. 4, vol. xiv, p. 197. 



„' Malm. K. Yet. o. Yitt. Samli. Goteb. Handl., xiv, p. 80. 



,, Mcintosh. Invert, and Fishes, St. Andrews, p. 120. 



„ Tauber. Annul. Danic, p. 89. 



„ Langerhans. Canar. Annel., Nov. Act. Leop., xli, p. 113. 



„ Levinsen. Yidensk. Meddel. Foren. Kjoben., p. 205. 



Habitat. — On oysters near Prestonpans, in the Firth of Forth ; Berwick Bay, rare 

 (Dr. Johnston) ; in fissures of shale and sandstone north of the pier, St. Andrews ; under 

 stones at the East Rocks, St. Andrews, where it is abundant (B.M. and R.M.), and 

 between tide-marks, St. Peter Port, Guernsey; dredged also in the Sound of Harris in 

 6 — 8 fathoms ; under the crust of Corallina officinalis in company with Polydora, near low- 

 water mark, Lochmaddy, North Uist. 



Finmark (Malmgren). Canaries (Langerhans). 



Head (Plate L, fig. 4) somewhat ovoid, longer than broad. Eyes two, black, 

 placed towards the posterior border of the head and larger than in Malmgren's figure. 

 Anterior tentacles subulate, rather short ; median tentacles very small, arising just in 

 front of the eyes. The tentacular cirri are likewise somewhat short, being only a little 

 longer than the diameter of the body, and therefore Dr. Johnston's form — with these 

 organs three times the diameter of the body — differs. 



Body from one and a half to three inches in length, tapered anteriorly and more 

 distinctly diminished posteriorly, where it terminates in two subulate cirri. The general 

 colour is dull yellowish, greenish-yellow, or straw-coloured, with a distinct greenish- olive 

 or brownish line along each side, rather within the bases of the feet, and often presenting 

 a crenated appearance from the folding of the segments — especially anteriorly. The 

 proboscidian region of the body is paler from the hue of the proboscis. The ventral 

 surface is slightly greenish, a pale-greenish band passing along the bases of the feet to 

 the posterior end, but being most distinct anteriorly. In some examples a faint, inter- 



1851. 



)? 



1865. 



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?j 



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Eidalia 



1867. 



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1874. 



» 



» 



» 



1875. 



)> 



1879. 



)> 



1881. 



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1883. 



35 



