47 146 Proceedings of the Royal Irish Academy. 



uncini have about four rows of teeth above the main tooth, iu lateral view 

 5 or 6 rows can be seen. The posterior uncini have a much greater number 

 of teeth, as Langerhans has pointed out. 



In the second abdominal segment, there are 9 capillary setae and 7 

 uncini ; in the seventh segment there are 6-7 capillary setae and 14 

 uncini. 



The two specimens, which were mature, were found in September. This 

 form agrees with the E. rosea of Langerhans in the following points: — 

 (1) size, the Madeira specimens measuring 5 mm. ; (2) number of branchiae ; 

 (3) shape of the collar; (4) the number of segments composing the anal 

 funnel ; (5) the number and arrangements of the ventral glands ; (6) the 

 distinction between the uncini of the anterior and posterior abdominal 

 segments. 



The only points of difference noted are (1) the absence of eyes on the 

 peristomium and anal segment. This may be due to the method of preserva- 

 tion ; (2) the larger number of setigerous segments, e.g. 26 as against 20 ; 

 (3) the difference in the structure of the basal thoracic capillary setae, which 

 are winged in the Irish specimens, and without wings in those from 

 Madeira. 



As these differences, in themselves not very important, may be minimized 

 by future observations, it seems preferable for the present to regard the two 

 forms as identical. This is another instance of the great affinity between the 

 fauna of the west coast of Ireland and that of Madeira. 



Habitat. — Ballynakill Harbour — Two specimens dredged in 1-3 fms. 



Distribution. — Madeira. 



Myxicola infundibulum (Eenier). 



1898. Myxicola infundibulum. De Saint-Joseph, p. 433. 



The only place in the Clare Island area where this species has been 

 found is a small patch of muddy sand near the entrance of a small stream 

 into Ballynakill Harbour. 



Habitat. — Ballynakill Harbour — On the shore of Fahy Bay. 



Distribution, — South-west coast of England ; France ; Mediterranean. 



Family SERPULIDAE. 



Serpula vermicularis L. 

 1894. Serpula vermicularis. De Saint-Joseph, p. 328. 

 Habitat. — Blacksod Bay — Found under stones on the shore on 3 

 occasions. Clew Bay — Dredged on 8 occasions, in 5-28 fms. 

 Distribution. — British Isles ; North Atlantic ; Mediterranean. 



