EVARNE IMPAR. 357 



and is probably due to imperfect or peculiar preservation. Crystalline masses are present 

 in the centre of the bristles, and in the case of the ventral distend in some the bases of 

 the spinous region. 



Reproduction. — Specimens procured in Norway in summer (Canon Norman states) 

 bear large ova. Small examples (about 6 mm.) from Loch Portan, Lochmaddy, had 

 advanced ova in August. A little larger example had advanced ova in Whalsay on 

 July 17th. A ripe male again occurred at ninety fathoms off North Uist in July. 



No ripe forms have been seen at St. Andrews, though numerous small ova are present 

 in the middle of May. 



Habits. — The haunts of this species are similar to those of other Polynoidae. It 

 occurs under stones between tide- marks, in the crevices of tangle-roots, and in the 

 cavities of shells — both bivalve and univalve. It was also included in the annelids pro- 

 cured from holes in the telegraph cables in 1876, and which were thought by Dr. 

 Carpenter to be borers in the gutta-percha, It is of course free from suspicion on this 

 head. 



It presents a rougher aspect than Harmothoe imbricata, from which it likewise 

 differs in colour, and it is much more tapered posteriorly. It is also more lively, being 

 active and irritable, as well as frequently breaking in pieces if molested. The movements 

 are more graceful than usual in the group, and the long caudal styles are generally 

 carried nearly in contact. It is likewise brilliantly phosphorescent. Like others of the 

 family, it bears confinement well, and can be transmitted inland and kept for months in a 

 small vessel of sea water. 



In this, as in other forms, palpi and other appendages as well as the posterior part 

 of the body are readily reproduced. 



Parasites. — Levinsen mentions Herphyllobius crassirostris, Sars, as a Crustacean 

 parasite fixed to the body of Evame impar in Norway. 



Dr. Johnston's Lepidonotus pellucidus may be a young example of Evame. 



Claparede (1863) drew special attention to the palpocils on the cilia of the cirri, and 

 showed how general these organs were in the annelids. 



De Quatrefages (1865) followed Johnston in assigning only thirteen pairs of scales 

 to this species. Prof. Giard (1886) does not think that the P. articulata of Claparede 

 is identical with this form, as I did in the ' Zoological Transactions.' He also says 

 P. spinifera, Ehlers, is an allied but not identical form, since the position of the eyes is 

 different, and the elytra are not fringed as in E. impar. Remarks on these forms are 

 made elsewhere. 



Hornell (1891) records examples from Southport of 33 mm. in length, and thirty- 

 seven segments, whereas Malmgren gives only thirty- five and De St. -Joseph thirty- 

 eight. 



Varieties. — A variety from 358 fathoms in the 'Porcupine' of 1870 shows some 

 shorter ventral bristles, the dorsal being pointed. It is a female. 



In young specimens procured in the ' Triton ' in 1883 by Dr. Gwyn Jeffreys only 

 the intermediate horny papillae occurred on the scales along with the cilia. The eyes 

 were invisible in the preparations. 



Dr. Michaelsen describes a variety from Heligoland, Harmothoe impar, var. 

 Pagenstecheri, of which he gives a special description. By his courtesy a careful 



