146 Proceedings of the Royal Irish Academy 



Family ENCHYTRiEID^. 



Henlea Dicksoni (Eisen). 



1907. S. D., Southern in Irish Nat., p. 70, PL 19, fig. 5. 



Mature— YohYWd^xj, June ; June (im.). 



Halitat — Ireland. Summit of Montpelier, Co. Dublin. 



Isle of Man. Port Erin. 

 Distribution — Nova Zembla ; Germany ; Switzerland. 



Henlea nasuta (Eisen) . 



1896. H. n., Friend in Naturalist, p. 298. 



The single specimen obtained was very dark, each segment having several 

 rows of irregular glands. 



Mature — February. 



HaMtat—lvQldiWdi. Summit of Montpelier, Co. Dublin. 



Distribution— Yoik^hivQ (FxiQwd rec.) ; Denmark; Germany; Bohemia; 

 Italy France ; Siberia. 



Henlea hibernica Southern. 



1907. H. h., Southern in Irish Nat., p. 70, PI. 18, fig. 1. 



Since this species was described I have found it in several other Irish 

 localities. It is closely related to H, nasuta. The following table shows' the 

 chief differences : — 



Henlea hibernica Southern. H. nasuta (Eisen). 



Two oesophageal glands in the 8th 

 segment, leaving the 7th segment 

 unoccupied. 



Dorsal vessel rises in the 9th seg- 

 ment, and has three contractile 

 swellings in segments 8, 7, and 6. 



Duct of spermatheca is half total 

 length. 



Setse of anterior ventral bundles 5-9. 



Two glands in the 7th segment, just 

 behind the last pair of septal 

 glands. 



Dorsal vessel rises in the 8th seg- 

 ment, and has two contractile 

 swellings in segments 7 and 6. 



Duct of spermatheca is only quarter 

 total length. 



Sette 4-7. 



Mature — June, July, November. 



Habitat — Ireland. Co. Kerry (Glencar and Killarney); Co. Dublin 

 (Lambay) ; Co. Meath (Boyne valley). 



