15- 



Proceedings of the Royal Irish Academy. 



as this. Just behind the septum the nephridia are coloured brown. There 

 are three " flames " in the nephridium, besides that in the funnel. 



The spermathecae are large and sac-shaped (fig. 10, e). They are 

 constricted near the middle ; and the base is surrounded by an enveloping 

 glandular collar. The testes are of the usual shape and position. 'J'he male 

 funnel varies greatly in shape and proportions according to its state of 

 contraction. It varies from 6 to 10 times as long as broad; and the lip is 

 thrown into large, conspicuous spreading folds (fig. 10, Fj. This remarkable 

 character was very constant, and was found in specimens from widely distant 

 localities, and easily serves to distinguish this from all other species. The 

 duct is several times longer than the funnel. 



This species is most nearly related to L. sulterraneus. The chief 

 differences are : — 



L. suht erraneus (Vejd.). 

 Epidermis smooth, without glands. 



Corpuscles narrow. 

 Spermatheca3 spindle-shaped. 



S funnel with regular lip. 



Habitat — freshwater. 



Z. Evansi n. sp. 



Epidermis thickly covered with 

 glands. 



Corpuscles oval, frequently pointed. 



SpermathecEe roughly cylindrical, 

 with constriction in the middle. 



(? funnel with much enlarged and 

 folded lip. 



HaMtat — marine (littoral) . 



January, February, June, July, August. 



HaMtat — Ireland. Dublin Bay (Howth and Malahide). 



Isle of Man. Laxey ; Port Erin. 



l^cotland. Aberdour, Firth of Forth. 



Lumbricillus fossarum (Tauber). 



Plate X., fig. II. 



1900. Z./., Michaelsen in Tierreich, X., p. 82. 



1902. L.f., Ude in Fauna Arctica, Bd. 2, p. 10, Taf. ii., figs. 19-22. 



This species was very briefly described without figures by Tauber 

 and Levinsen. Ude (tom. cit.) gave a fuller description, and figured the 

 spermatheca, nephridium, and copulatory glands. 



The cuticle in each segment bears several rows of clear glands. The 

 brain (PI. x., fig. 11) is slightly concave before and behind, and is broader at 

 the back than the front. The anterior ventral bundles contain Q-S, rarely 



