i9i6. Friend. — Notes on Irish Oligochaets. 25 
AeGIALINA SIGMA, 11. Sp. 
Saenuris lineata Friend, Zoologist, 1912. 
Length about 20 mm. ; segments 65 or thereabouts ; 
Tubifex-Hke in character, coiHng up, and not swimming 
hke Lumbricillus. Head and tail pale, middle portion of 
the body ruddy brown, owing to the blood vessels (red) and 
chloragogen cells (brown) ; setae sigmoid, or shaped like an 
italic /, 4 bundles in each segment, 2-4 per bundle. Hearts 
as in Clitellio and other genera in the 8th or 9th segments. 
Nephridia in 6-7 and 7-8 with glandular cells, clear as in 
Limnodrilus {Hoffmeisteri, &c.) ; also in segments 12 and 
later. Chloragogen cells begin in 6 ; no strong pharynx as 
in Enchytraeus, but cephaHzation exactly as in Tubificids. 
Male pores on segment 11, without ventral setae. Brain 
concave in front, incised behind. Cf. Zoologist^ as cited 
above. 
Distribution. — Ringsend, Dublin, March, 1913, in sand, 
with Lumbricillus lineatus O.F.M. and other Pachydrilids. 
Generally distributed on the sea coast and estuaries of the 
British Isles — Middlesborough, Gravesend, Plymouth, and 
Aberystwyth. At present unknown on the Continent of 
Europe or elsewhere. 
A NEW Irish Naid. 
During my visit to Ireland in 1896 a good deal of material 
was collected which has never yet been properly examined. 
Among my notes I find references to a water -worm which 
has not hitherto been recorded. It is a species of Naidium 
which differs from all whose descriptions I have been able 
to study, and I therefore name it Pristina variabilis.^ The 
full description will appear elsewhere, but the following 
detail may serve for its recognition should it again be 
found : — 
Pristina variabilis, sp. n. — Number of segments, 25. 
Very transparent. Two black eye -spots. Setae commence 
in the second segment, and consist of two kinds, bidentate 
and capilliform. The capilliform are of unequal lengths, 
^ The name Pristina inaequalis, which I intended to use, has aheady 
been employed by Ehrenberg. 
