SouTHicRN — Monograph of the British and Irish Oligochceta. 161 



Fridericia paroniana Issel. 



1904. F. p., Issel in Atti Soc. Ligustica, vol. xv., p. 3. 



1905. F. p., Issel in Zool. Jahrb., Bd. xxii., p. 466. 



The distinctions between this species and the next one, F. hisetosa, are 

 veiy slight. As regards such slight differences as can be found in the 

 descriptions of the two species, the Irish specimens agree with F. paroniana. 



In some specimens from Bray Head, the salivary glands were slightly 

 divided at the tip, and not entire, as they usually are. 



May, February, November, December. 



Habitat — Ireland. Co. Wicklow (Bray Head) ; Co. Dublin (Kilmashogue ; 

 Friarstown Glen). 



Distribution — I taly . 



Fridericia bisetosa (Levins). 



1900. F. b., Michaelsen in Tierreich, x., p. 96. 



This species differs from the last, in having a larger number of segments* 

 in the different shape of the spermatheca, and in the absence (in the specimens 

 I examined) of the large gland at the pore of the spermatheca. 



June, July. 



Habitat — Wales. Merionethshire (Barmouth). 



Distribution — Denmark ; Germany ; Austria ; Italy ; Switzerland. 



Fridericia aurita Issel. 

 1905. F. a., Issel in Zool. Jahrb., Bd. xxii., p. 468. 

 1907. F. a., Southern in Irish Nat., vol. xvi., p. 74, PI. 19, fig. 10. 

 March, June, August -October. 



Habitat— Ixeloxidi. Co. Wicklow (Bray Head) ; Co. Dublin (Lambay). 

 Distribution — Italy. 



Fridericia connata Bretscher. 

 1902. F. c, Bretscher in Eev. Suisse Zool., p. 20. 

 1907. F. c. Southern in.IrishNat., vol. xvi., p. 75, PI. 19, fig 11. 

 May-September. 



Habitat— Ireland. Co. Wicklow (Kilruddery) ; Co. Dublin (Lambay) ; 

 Co. Donegal (Milford). 

 Isle of Man. Port Erin. 

 Distribution — Switzerland. 



Fridericia Leydigi Vejd. 



1900. F I., Michaelsen in Tierriech, x., p. 97. 



The specimens which I refer to this species differ in several points from 

 Vejdovsky's description (27. p. 59). The brain is convex in front, not 



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