132 Transactions of the Society. 



The position of the girdle and other organs allies this species with 

 B. appendiculata, from which it differs in the shape of the brain, 

 diverticulum, sperrnathecse, sperm-funnel, and other particulars. 

 While B. appendiculata is stout, the new species is attenuated, 

 whence its trivial name. 



Habitat. — Under moss in the Alexandra Park, Hastings. Col- 

 lected at the end of June 1912 ; described February 13, 1913, but 

 the details now published for the first time. When B. focale was 

 examined, I was daily expecting to be called to Hastings again on 

 domestic business, and hoped to be able then to obtain new 

 material. It was not till six months after my former visit, how- 

 ever, that I was able to examine the spot, and the results are note- 

 worthy. In December I found B. focale, in June B. tenuissima. 

 Such striking facts are continually coming under one's observation, 

 and are of exceeding interest in the study of Enchytrseid bionomics. 



We now have four British species of Buchholzia on record, 

 which may be distinguished thus : — 



1. Girdle on segment 12. 



(i) Dorsal diverticulum present, from 



which dorsal vessel arises . . B. fallax 



(ii) Dorsal diverticulum absent ; dorsal 



vessel arising in segment 12/13 . B. focale 



2. Girdle on segment 8. 



(iii) Spermathecse with pear-shaped am- 

 pulla, and two large glands . B. appendiculata 



(iv) Spermathecse with bulbous ampulla, 



destitute of glands . . . B. tenuissima 



The members of this genus are not, so far as our present know- 

 ledge goes, common in this country, and deserve a little further 

 study. I first reported B. fallax Mich, as British in the Irish 

 Naturalist for 1898, as having been taken on the shores of Lough 

 Neagh in June 1896, and, about the same time, at Lodore and 

 Lowther in Cumberland. My later records are Ledbury Church- 

 yard, April 17, 1911 ; Eel-traps on Sutton Broad, August 19, 1911 ; 

 Cauldwell, near Burton-on-Trent, June 11, 1912 ; Dundrum Boad, 

 Dublin, March 7, 1913; Blenheim Park, Oxon, April 14, 1913. 

 The species seems liable to a good deal of variation. B. appendicu- 

 lata, however, seems more fluid still, and presents many problems 

 which I have not yet been able to solve. I first found and figured 

 it April 21, 1892. It was first recorded as British, however, by 

 Southern (6) in 1909. The type and varieties have been found 



