British Fnchytrseids. By Rev. H. Friend. 153 



85. R. tenella Eisen. 1878, Archienchytrseus tenellus Eisen 

 in Ofv. Ak. Forh., xxxv. No. 3, p. 70 ; Michaelsen, Das Tierreich, 

 p. 70. 1911, Friend, in Zoologist, pp. 467-8. 1912, J.R.M.S., pp. 

 585-6. Acresibrd, near Ashby-de-la-Zouch, November 28, 1911. 

 1913, Irish Nat., xxii. p. 172, a form found in Dublin at present 

 referred to this species provisionally. 



86. H. trisetosa Friend. 1913, Friend, in Zoologist, No. 861, 

 p. 86. See supra, p. 139. In tree-stump with H. quadruplet 

 Friend at Midway, between Ashby and Burton, January 30, 

 1913. 



87. H. tubula Friend. 1913, Friend, in Irish Nat., xxii. p. 172. 

 First described supra, p. 139. Balls Bridge, Canal Side, Dundrum 

 Road, Dublin, and St. Doulough's, March 6 to 12, 1913. 



It will be seen that the British Annelid fauna is peculiarly rich 

 in Henleas and Fridericias. There are doubtless many more 

 species yet to be discovered. 



Mesenchytioeus Eisen. 



Setae present, sigmoid, fewer in lateral than in ventral bundles. 

 No salivary glands, no dorsal pores. Nephridia with small ante- 

 septal. 



88 M. beumeri Mich. 1896, Pachydrilus (M.) beumeri, 

 Michaelsen. See Das Tierreich, p. 86. 1909, Southern, in Proc. 

 Roy. Ir. Acad., xxvii. p. 155. County Kerry, Ireland. 



89. M. celticus Southern. 1909, Southern, in Proc. Roy. Ir. 

 Acad., xxvii. pp. 155-6 ; Montpelier, Dublin, December 1907 ; 

 Edinburgh, February 1908. 



90. M. fenestratus Eisen. 1878, Neoenchytrsnus fenestratus, 

 Eisen, in Ofv. Ak. Forh. xxxv. No. 3, p. 74; Michaelsen, Das 

 Tierreich, 85 ; see Ditlevsen, in Zeit. wiss. Zool., Bd. 77, 1904, 

 p. 439. 1897, Friend, in Irish Nat., as having probably been 

 found by Dr. Trumbull at Powerscourt, Wicklow. In poor condi- 

 tion ; record not confirmed. 



91. M. flavidus Mich. 1887, Michaelsen, in Arch. Mikr. Anat. 

 xxx., p. 372. Das Tierreich, p. 35. Found June 11, 1912, at 

 Swain's Park, Swadlincote, Derbyshire, and now recorded for the 

 first time as British. Varies a little from Michaelsen's type. 



92. M. oligosctosus Friend. 1913, Friend, in Zoologist, December, 

 p. 462. Jersey, Collected by Mr. Hill man. 



93. M. setosus Mich. 1888, Michaelsen, in Arch. Mikr. Anat. 

 xxxi., p. 494 ; Das Tierreich, p. 85. 1907, Southern, in Irish 

 Nat. xvi., p. 71. 1909, Proc. Roy. Ir. Acad, xxvii., p. 155. 

 Cauldwell, Derbyshire, June 11, 1912. On August 8, 1913, I 

 found it with other Etich) trseids between Oberlieber and Brauns- 

 berg, Neuwied-am-Rhein. 



