206 NEEEIS (PERINEKEIS) MARIONII. 



Synonyms. 



1833. Nereis Marionii, 1 Aud. & Eclw. Ann. So. Nat., t. xxix, p. 207, pi. xiii, f. 1—6. 



1834. „ „ idem. Annel., p. 185, pi. iv a, f. 1—6. 



1847. „ succinea, Frey and Leuckart. Beitrage, p. 154, Taf. ii, f. 9 and 11. 

 1851. „ „ Grube. Fam. Annel., pp. 49 and 127. 



1865. „ Marionii, De Quatrefages. Annel., p. 549. 

 „ „ crassipes, idem. Ibid., p. 550. 



1867. Stratonice Marioni, Malmgren. Annul. Polych., p. 56. 



1868. Nereis lamellosa, Ehlers. Borstenw., ii, p. 564, Taf. xxii, f. 10—17. 



succinea, idem. Ibid., ii, p. 570, Taf. xxii, f. 18—22, 



1870. „ (Lipephile) macropus, Claparede. Annel. Nap. Snppl., p. 80, pi. viii, f. 1. 



,, ., Marionii, Grube. Arch. f. Naturges., Bd. xxxvi, p. 305 (?). 



,, ,, crassipes, idem. Ibid., p. 304. 



1885. ,, lamellosa, Cams. Fauna Meclit., p. 221. 



1898. „ longipes, De St. Joseph. Ann. Sc. Nat., 8 e ser. ; t. v, p. 314, pi. xvii, f. 107—112. 



1902. ., Marionii, Mcintosh. Ann. Nat. Hist., ser. 7, vol. x, p. 256. 



1908. „ (Neanthes) succinea, Horst. Notes Ley den Museum, vol. xxx, pp. 215 — 218, Text- 



figs. 1-4. 



1909. ,, „ „ idem. Tijdschr. NederL Dierk. Vereen. (2), xi, p. 144. 



Habitat. — In galleries in cracks of rocks, St. Peter Port, under stones at Perrelle 

 Bay, Guernsey, and in similar places in Herm. South of England, Plymouth (Allen). 



Shores of France (Milne Edwards and De St. Joseph) ; Naples (Claparede). 



Head (Plate LX, fig. 9) marked by dark pigment on the dorsum, but with a pale 

 posterior margin so as to be abruptly denned from the peristomial segment. Eyes not 

 larger than in other species of Nereis, and having the same position ; brownish, with a 

 black speck in the centre, the anterior pair with lenses, and occasionally a minute 

 lens in the posterior. Dorsal of the first or upper pair of tentacular cirri longest, the 

 cirrophore being greenish, the ventral much shorter in proportion than in the other 

 species, and in addition rather thick. The other pair is longer than the latter, but 

 shorter than the former, the dorsal slightly exceeding the ventral in length. All the 

 cirri are somewhat short. The peristomial segment is about twice as broad as the 

 succeeding. 



Body 3 — 4 ins. long, slightly tapered anteriorly, but more distinctly posteriorly, where 

 it terminates in two short cirri. 3 The peristomial segment is about twice as broad as the 

 succeeding. In large examples the dorsum anteriorly is dull olive green, paler green 

 posteriorly, the tints being the more pronounced from the pallor of the feet and their 

 processes, as well as from the whitish patch in front of each foot. There is also a little 

 white pigment in the median line of the dorsum. Though supplied with blood-vessels, 

 the lobes of the posterior feet appear to be pale, and this, with the whitish pigment at 

 the base, aids in the discrimination of the species. About the thirtieth foot a consider- 

 able dorsal elevation at the base of the foot occurs, and continues to the posterior end of 

 the body. It is marked by the same opaque granular glands as are found in the dorsal 



1 Named after Dr. Marion de Proce, a naturalist and physician of Nantes. The Scottish 

 University Commissioners of 1889 do not encourage such talent in the department in our country. 



2 In some four short filaments on each side of the vent (De St. Joseph). 



