198 MICRURA FASCIOLATA. 



Synonyms. 



1788. Planaria filaris, O. F. Muller. Zool. Danic, ii, p. 38, tab. 68, f. 18—20. 



» >, ,> Gmelin. Linnseus Syst. Nat., torn, i, pars vi, p. 3093. 



1808. „ lineata, Montagu, MS. tab. 56, f. 5. 



1831. Micrura fasciolata, Ehrenberg. Symb. Phys., Phyt. Turb., No. 15, tab. 4, f. 4, a—i. 



1827. Planaria filaria, Bosc. Hist. Nat. des Vers., i, p. 261. 



1844. Nemertes pusilla, CErsted. Entw. Plattw., p. 90. 



a „ fasciolata, Ibid. Op. cit., p. 91. 



w a pusilla, Ibid. Kroyer's Nat. Tids., iv, i, p. 578 (partim). 



99 99 99 Ibid. De Region. Marin., p. 80. 



1847. Pylidium gyrans (young form), Muller. Archiv fur Anat., p, 159, taf. 7, f. 1—4. 



1850. Micrura fasciolata , Diesing. Syst. Helm., vol. i, p. 261. 

 „ Nemertes pusilla, Ibid. Op. cit., p. 271 (partim). 



1851. Pylidium gyrans, Busch. Beobacbtungen iiber Anat., &c., p. 107, taf. 16, f. 1—8. 

 „ Alardus caudatus, Ibid. Op. cit., p. Ill, taf. 11, f. 8. 



1853. Gordius fragilis spinifer, Dalyell. Pow. Creat., vol. ii, p. 79, pi. 11, f. 5 (var.). 

 „ „ fasciatus spinifer, Ibid. Op. cit., p. 80, pi. 11, f. 6—15. 



„ Alardus caudatus, Muller. Abbandl. Berl. Akad. (1852), p. 59. 



1854. Pylidium gyrans, Gegenbauer. Zeitscb. fur wiss. Zool., v, p. 345. 



Muller. Arcbiv, p. 75, taf. 4, f. 2—8. 

 „ Alardus caudatus, Ibid. Op. cit. 

 1858. Pylidium gyrans, Krohn. Miiller's Arcbiv, p. 289. 

 „ Alardus caudatus, Ibid. Op. cit. 

 „ Micrura filaris, Muller. Archiv, p. 330 (note) . 



1861. Pylidium gyrans, Claparede. Becher. Anat. sur les Annel., Turb., &c, p. 54, pi. 5, f. 3 and 4 (?) 



1862. Micrura fasciolata, Diesing. Bevis. der Turbell., pp. 258—260. 

 „ „ filaris, Ibid. Op. cit., p. 260. 



„ Meckelia cceca, Ibid. Op. cit., p. 286. 



„ Nemertes pusilla, Ibid. Op. cit., p. 298. 



1863. Micrura fasciolata, Diesing. Nachtrage z. Bevis. der Turbell., p. 7. 

 1865. Stylus fragilis, Johnston. Catalogue Brit. Mus., pp. 24 and 293. 



„ „ fasciatus, Ibid. Op. cit., pp. 24 and 293. 



1869. Micrura fasciolata, Mcintosh. Trans. Boy. Soc. Edinb., vol. xxv, pt. ii, p. 374. 



Habitat. — In fissures of the rocks near low water, in the coralline region, and oyster-beds. 

 Ranges from the Shetland Islands to the Adriatic. 



Body. — Four to six inches in length, and about a line in breadth, flattened on the ventral 

 surface, about as much tapered anteriorly as posteriorly, and with a slender styliform process 

 attached to the tail. 



Colour. — Fine reddish brown of various shades, banded across with white belts at somewhat 

 regular intervals, and with the tip and sides of the snout pale. The styliform process is pale and 

 translucent. Ventral surface paler than the dorsal, but also inclining to reddish brown, and 

 marked by distinct lines or furrows, which are continuous with the white dorsal bands. The first 

 white dorsal belt usually occurs a little behind the termination of the cephalic fissures, but occa- 

 sionally the presence of some dark red pigment near the tip of the snout cuts a stripe off the pale 

 portion. The white bars are sometimes lozenge-shaped, from a dilatation in the middle. Some 

 specimens from the coralline ground off St. Andrews are of a very pale brown or fawn colour on 

 the dorsum, darkest in front, without white stripes, the only markings being the transverse 



