178 NEMERTES NEESII. 



author did not observe any cephalic furrows, or " genital aperture" (mouth), and therefore he 

 concluded that the latter was a temporary orifice. Its mouth occupies the usual position. 



2. Nemertes Neesii, CErsted. Plate III, fig. 6 ; and var., Plate VII, fig. 6. 



Specific character. — Eyes numerous. Stylets short and grooved. Streaked with purplish- 

 brown on the dorsum. 



Synonyms. 



1828. Planaria flaccida, Johnston. Zool. Journ., vol. iii, p. 488. 



1844. Amphiporus Neesii, CErsted. Kroyer's Naturhist. Tids., iv, p. 581. 



„ „ „ Ibid. Entw. Plattw., p. 95. 



1846. Borlasia? flaccida, Johnston. Ann. Nat. Hist., vol. xvi, p. 435. 



„ „ camillea, De Quatrefages. Ann. des sc. nat., 3 me ser., Zool., torn, vi, p. 194, tab. 9, 



f. 1, and tab. 14, f. 3. 



1849. „ „ Ibid. Voyage en Sicilie, vol. ii, p. 106, pi. 10, f. 4 and 5. 

 „ Amphiporus Neesii, Leuckart. Archiv fur Naturges., i, p. 149. 



1850. „ „ Diesing. Syst. Helm., vol. i, p. 245. 

 „ Nemertes camillea, Ibid. Op. cit., p. 274. 



1853. Gordius fuscus, Dalyell. Pow. Creat., vol. ii, p. 83, pi. 9, f. 15 to 17, and pi. 12. 



1859. Amphiporus Neesii, Leuckart. Archiv fur Naturges., ii, p. 187. 



1862. Borlasia Neesii, Diesing. Revis. der Turbell., p. 249. 



„ Emplectonema camillea, Ibid. Op. cit., p. 306. 



1865. Serpentaria fusca, Johnston. Catalogue Brit. Mus., pp. 28 and 298. 

 1865-6. Borlasia Camilla, De Quatrefages. Hist. Nat. des Anneles, pi. 4, f. 14. 



1866. Serpentaria fusca, Lankester. Ann. Nat. Hist., 3rd ser., vol. xvii, p. 389. 



1868. Ommatoplea purpurea, Mcintosh. Ann. Nat. Hist., 4th ser., vol. ii, p. 293. 

 „ „ „ Ibid. Report Brit. Assoc, 1868, p. 340. 



1869. „ „ Ibid. Trans. Roy. Soc. Edinb., vol. xxv, p. 336 et seq. 



Habitat. — Under stones between tide-marks, in crevices of rocks and tangle-roots near low 

 water, and in fissures of the Gouliot caves, Sark. It also occurs on the tangle-ground in 

 Shetland, and in deep water off the east coast of Scotland. Ranges from Iceland to the Channel 

 Islands. 



Body. — Pour to eighteen inches in length, and, in large specimens, about a quarter of an 

 inch in breadth, elongated, much flattened, appearing almost of equal diameter throughout, 

 though in reality slightly tapering towards the posterior end. It is generally thrown into 

 numerous equidistant transverse wrinkles, which are only obliterated in extreme extension. 



Colour. — -Variously speckled madder-brown, with a faint purplish iridescence from the 

 play of light on the cilia. Towards the anterior part of the body the specks are more marked, 

 and the general colour somewhat paler, especially on the head. Behind the latter the dorsum 

 assumes a streaky appearance, brown being the predominant hue, with longitudinal flesh- 

 coloured stripes, all of an interrupted character. The lateral regions abound with brown 



