316 HARMOTHOE IMBRICATA. 



879. Polynoe imbricata, Theel. Kongl. sv. Yet. Akad. Handl.,Bd. xvi, 3, p. 9. 

 1881. „ cirrata, Horst. Mederland. Archiv Zool., 1881, Suppl. Bd. i, p. 5. 



» « « Pelsener. Bull. Soc, Boy. Malacol. Belg., xiv, p. lxxxix. 



1883. « « Kallenbach. Inaugur. Dissert. Eisenach, 1883. 



„ Harmothoe imbricata, Levinsen. Nord. Annulat., 194. 



„ Polynoe imbricata, L. Wiren, Chsetop. ' Yega ' Exped., &c, p. 389. 

 1884. „ cirrata, Cams. Fauna Medit., i, 201. 



„ Harmothoe imbricata, Webster and Benedict. Ann. Mass., 701. 

 1886. » „ Harvey Gribson. Yerm. Liverp., 149. 



1888 - « » De St. Joseph. Ann. Sc. Nat., 1888, p. 161, pi. vii, f. 21. 



1889 - » , » Trautzsch. Jenaiscbe Zeitscb. f . Nat., xxiv, p. 66, and Arch, f . Naturges., 



55 Jahr, Bd. i, Hft. 2, p. 136, pi. vii, f. 1. 



1890. „ „ Malaquin. Ann. Boulon., 21. 



1891. Polynoe (Harmothoe) imbricata, Hornell. Polycha3ta, Liverpool Dist., p. 231, pi. xiii, f. 2. 



1896. Harmothoe imbricata, Michaelsen. Polych. Fauna, p. 11. 



„ Polynoe (Harmothoe) imbricata, Roule. Camp. d. c Caud./ 443. 



1897. Harmothoe imbricata, H. P. Johnston. Pacific Annel., Calif or. Acad. Sc, 181, pi. vii, f. 37. 

 I 898 - „ „ Michaelsen. Gronl., Ann., p. 121. 



The head (Plate XXV, fig. 6) is broader posteriorly than anteriorly, and shows only 

 a single pair of eyes, which are of moderate size and just in front of the nuchal collar. 

 The other and somewhat larger pair are placed under the anterior peaks, and present 

 a trace of a cuticular lens. They look forward, outward, and slightly downward. 

 Some specimens have the anterior eyes a little more lateral in position, so that they are 

 partially seen from the dorsum, and occasionally an additional eye lies midw^ay on one 

 side, as in an example from the stomach of a haddock at St. Andrews and in another 

 from Shetland (Fig. 25) ; while in a third from the latter region (Bressay Sound) the 



Fig. 25. Fig. 26. 



/ v \ 



Fig. 25. — Head of Harmothoe imbricata with an additional eye on the right, and the anterior pair more than 

 usually evident. 



Fig-. 26. — Head of Harmothoe imbricata with three posterior eyes, while only one anterior is visible from the 

 dorsum. 



anterior eye on the left has moved backward, so as to resemble the position in Lagisca 

 floccosa (Fig. 26), and in another from Lochmaddy the right anterior eye approaches the 

 posterior even more closely. A still more remarkable variation exists in a young 

 example from the same region in which both anterior eyes have moved backwards, so 

 that they occupy the position of those in Evarne. The median tentacle is of moderate 

 length, with a brownish column, a dark belt below and often encroaching on the whitish 

 enlargement, and another dark belt beyond it at the base of the filiform process. The 

 lateral tentacles are only slightly enlarged below the filiform tip, and have a few short 

 clavate papillae on the surface. The tentacular cirri are similar in shape and colour to the 

 median tentacle. The palpi have rows of short and somewhat truncate clavate papillae, the 

 terminal surface showing in many minute processes. 



