292 NEREIS SCHMARDSEI. 



behind the inferior setigerons process. In full development (e.g., the sixty-fifth foot) a 

 dorsal fan-shaped lamella, a large lamella of similar shape behind the inferior setigerons 

 lobe, and a larger and a smaller lamella at the ventral cirrus characterize the foot. The 

 dorsal, middle, and ventral lobes of the foot are flattened and elongated, and swimming 

 bristles occur in both divisions. 



Synonyms. 



1865. Heteronereis Schmardsei, De Quatrefages. Aimel., i, p. 569, pi. vii, f. 11, and pi. ix, f. 7. 



1867, Praxithea irrorata, Malmgren. Annul. Polych., p. 51 (167), Taf. iv, f. 24. 



1868. Nereis rubicunda, Ehlers. Borstenw., ii, p. 529, Taf. xxi, f. 5—9. 



Heteronereis Schmardsei, Grube, Mitth. iiber St. Yaast-la-Hougue (and Jahresb.), p. 126. 

 1870. „ „ idem. Jahresb. der Scliles. Gesells. fur 1869, p. 52 (fide Auct.). 



idem. Mitth. iiber St. Malo u. Roscoff (ibid. Jahresb.), 1869—72 

 p. 91. 



idem. Arch. f. Naturges., Bd. xxxvi, p. 312. 

 1874. Praxilla irrorata, Malm. Groteb. vet. o. vitt. Handl., xiv, p. 84. 

 1879. Heteronereis Schmardsei, Tauber. Annul. Danic., p. 98. 

 1883. Nereis irrorata, Leviusen. Yidensk. Meddel. Foren. Kjoben., p. 235. 

 1885. ,, rubicunda, Cams. Fauna Medit., p. 220. 



1888. Praxithea irrorata, De St. Joseph. Ann. Sc. Nat., 7 e ser., t. v, p. 263, pi. xi, f. 131. 

 1895. „ „ idem. Ibid., 7 e ser., t. xx, p. 215, pi. xii, f. 33 -36, pi. xiii, £. 37—39. 



1898. Nereis „ idem. Ibid., 8 e ser., t. v, p. 299, pi. xv, f. 82, 



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



1904. ,, „ Allen. Journ. M. B. A., n.s., vol. vii, p. 224. 



1906. Praxithea „ Bohn. Ann. Sc. Nat., 9 e ser., t. hi, p. 83. 

 „ Nereis „ De St. Joseph. Ibid., 9 C ser., t. iii, p. 219. 



1909. „ „ Elwes. Journ. M. B. A., n.s., vol. viii, p. 352, 



Hpitokous Form. 



1864. Heteronereis signata, Baird. Journ. Linn. Soc, vol. viii, p. 8, Taf. i, f. 1 (?). 



1865. „ „ Johnston. Cat. Worms Brit. Mus., p. 341 (?). 



Habitat. — In tubes between tide-marks, St. Peter Port, Guernsey, July, 1868. In 

 similar regions at Plymouth, and small specimens also dredged (Allen). 



Apparently chiefly a southern form. It is not uncommon on the shores of France, 

 such as at St. Vaast, Roscoff, and Dinard, amidst the prairies of Zostera. It is also found 

 in Sweden. 



Head (Plate LX, fig. 8) has the typical outline, though the palpi have somewhat 

 slender terminal joints, with a ring of madder-brown within the tip. Anterior eyes oval, 

 posterior circular. They are furnished with lenses, and in the fully developed epitokous 

 form De St. Joseph found them almost coalesced. Tentacles comparatively stout and 

 short. Tentacular cirri rather long. A curious madder-brown patch like a crown with a 

 median longitudinal streak occurs in front of the head, and behind it a brownish patch 

 with a pale area on each side of the posterior eyes. 



Body 4—5 ins. long (15—18 cm., De St. Joseph), more definitely tapered anteriorly 

 than usual, and posteriorly terminating in two long anal cirri. The anterior third is of 

 a pale flesh-colour toning to pale yellow or dull whitish posteriorly. The peristomial 



