1873. 



1875. 

 1876. 

 1879. 

 1886. 



354 EVARNE IMPAR. 



1863. Polynoe impar, Claparede. Anat. u. Entwickel., 60. 



1864. „ „ Kolliker. Kurz. Bericht., p. 15, pi. vi, f. 4—6. 



1865. Lepidonotus impar, Johnst. Cat. B. M., 112, pi. viii, f. 3 — 9. 

 „ Evame impar, Malmgren. Nord. Hafs-Ann., 71, Tab. 9, f. 7. 



„ De Quatrefages. Anneles, 226. 

 „ Sars. Bid. Christ. Fauna, p. 4. 

 „ Mcintosh. Invert, and Fishes, St. A., p. 116. 



idem. Trans. Zool. Soc., ix, 386, pi. lxx, f . 1—3 ; ibid., p. 398, 

 „ Tauber. Ann. Danic., 81.- 

 „ Marenzeller. Porif., &c, Jan Meyen, p. 11. 

 „ G-iard. Bullet. Sc. Nord, i, 16, with figs. 

 1888. Harmothoe impar, De St. -Joseph. Ann. d. sc. nat. (7), v, p. 162. 



1890. „ „ Malaquin. Ann. Boulon., 18. 



1891. Polynoe (Evame) impar, Hornell. Op. cit., 232, pi. xiii, f. 3 and 6. 



1896. Harmothoe impar, var. Pagenstecheri, Michaelsen. Polych. Fauna, p. 7, pi. i, f . 1. 



1898. „ „ „ „ De St.-Joseph. Op. cit., 1898, 231, pi. xiii, f. 14—20. 



Habitat. — Everywhere distributed round the British shores — from Shetland to the 

 Channel Islands, and ranging into the Atlantic to the depth of 690 fathoms, as well as 

 extending (fide Verrill) to the shores of America, from Cape Cod to the St. Lawrence. 

 It occurs not only in purely salt water, but in such lochs as Loch Portan, Lochmaddy, 

 which receive a stream of fresh water, small examples are likewise found. 



Length about an inch. The finest examples in my collection are from the west 

 coast of Ireland and the Irish Channel. 



Head (Plate XXVII, fig. 13) somewhat wider than long, with the usual median 

 groove, which widens out anteriorly to join the prominent lateral peaks. The eyes are 

 large and visible from the dorsum, the posterior pair widely apart, and situated imme- 

 diately in front of the nuchal collar; the anterior pair, which are scarcely larger than the 

 posterior, being on the projecting lateral region, and thus little removed from the former, 

 while they are separated by a considerable interval from the peaks. In an example from 

 Whalsay, Shetland, the anterior pair of eyes were nearer the posterior than usual. In 

 those from deep water the eyes are somewhat larger, but forms between tide-marks 

 show considerable differences in this respect, some having large, others small eyes. 

 Again, a young specimen 6 or 7 mm. long, procured on a thick mass of Flustra off Fermain 

 Bay, Guernsey, had no eyes. The median tentacle is of considerable length and strength, 

 generally of a madder-brown colour, and with a pale dilatation marked off by bars below 

 the filiform tip. It is rather densely covered with clavate cilia, some of which equal in 

 length the diameter of the process. The lateral tentacles are inferior, subulate and 

 tapering, and have numerous short clavate cilia. The tentacular cirri are similar to, 

 though smaller than, the median tentacle. Palpi of average length — with a tapered 

 extremity, and densely covered with minute clavate papillse, which occur from the base to 

 the commencement of the filiform tip. These papillaa are proportionally large. 



Body moderately elongate, somewhat thin and flattened, the broadest part being 

 about the anterior third, and thence tapering to the tail. The hue of the dorsum is 

 greenish-brown, darkest in front, and forming somewhat regular bars and touches along 

 the back. Some, again, have the dorsum very prettily and symmetrically barred with 



