MICRONEREIS VARIEG-ATA. 261 



1. Microneeeis variegata, Claparede. Plate LXXXVI, fig. 8 — bristle. 



Specific Characters. — Head rounded in front, with traces of palpi, and four large eyes, 

 the anterior pair wider apart and with lenses. Tentacular cirri four, enlarged at the base, 

 which is coloured greenish or yellow. 



Body 4 mm. long, very little tapered in front, but diminished from the third 

 segment to the tail, which has two caudal cirri of the same tint as the tentacular cirri 

 (Claparede). Bristled segments nineteen to twenty. Proboscis muscular; two horny 

 maxillae with five teeth. 



With the exception of the first two, the feet are deeply biramous, the setigerous 

 lobes dilated distaJly and furnished with a subulate and subterminal dorsal and ventral 

 cirrus. Each lobe has a group of translucent homogomph bristles, with long, finely 

 tapered terminal pieces, the dorsal being somewhat longer than the ventral. 



Synonyms. 



1863. Micronereis variegata, Claparede. Beobacht. u. Anat., p. 57, Taf. xi, f. 5 — 7. 



1864. ,, „ idem. Grlanures Zoot., p. 122, pi. viii, f. 4. 



1865. „ „ De Quatrefages. Annel., i, p. 578. 



1893. „ „ Eacovitza. Compt. Rend., 12 June, 1893. 



1894. „ „ idem. Ibid., 15 Jan., 1894. 



1900. ,, ., Fauvel. Mem. Soc. Nation, etc., Cherbourg, T. xxxi, p. 315. 



1909. „ „ Elwes. Journ. M. B. A., n.s., vol. viii, p. 350. 



Habitat. — Under a stone between tide-marks, St. Peter Port, Guernsey, July, 1868; 

 amongst littoral red algae and Lithothamnion between Oddicombe and Babbicombe 

 (Elwes). 



St. Vaast-la-Hougue, Normandy (Claparede). 



Head (Fig. 63, p. 262) rounded in front, and devoid of tentacles or palpi, though in 

 a preparation kindly forwarded by Major Elwes a bluntly conical process projected 

 ventrally on each side, but such may have been connected with the proboscis. Pour 

 large black eyes arranged in a trapezoid occur on the head, the anterior pair with 

 lenses and wider apart. The posterior pair show minute, glistening points as if 

 from crystalline cones. Tentacular cirri, four on each side, enlarged at the base and 

 banded with green or yellow and tapered distally, one of each pair being dorsal, the 

 other ventral. 



Body about 4 mm. long, little narrowed in front, and tapering from the third foot 

 gradually to the tail, which ends in two long, tapering cirri. Bristled segments nineteen 

 or twenty. The general colour is brown, as Claparede notes. 



The proboscis is a proportionally large muscular organ with two powerful maxillae 

 of a golden colour, short and broad in form and with five teeth on the edge in front 

 (Fig. 63), the largest tooth being anterior. In his first figure of the maxilla Claparede 

 indicated only three teeth on the edge, but his next representation shows six on one 

 side and seven on the other. 



The first foot is small and uniramous, and is borne apparently by the buccal 

 segment. It has a somewhat clavate setigerous region, that is, the process enlarges 



