DISTRIBUTION OF BRITISH ANNELIDS. 145 



15. E. rosea, Sav. 29,31 (=^- mucosa, Eisen). One or two 



well-marked varieties occur. 



V. Dendkobjena. 

 An interesting group of worms, some of which are regularly 

 found in rotten tree-stumps. They are usually a ruddy brown 

 or purplish colour, similar to Lumbricus castaneiis, but the head 

 does not entirely bisect the first segment, and the setae are 

 wider apart. 



16. DendrohcBna mammalis, Savigny (D. celtica, Eosa). 3 3 _ g^ 



25 — 32 



17. D. submontana, Vejdovsky. 28-^ 



26 — 32 



18. D. subrubicunda, Eisen. ^s- so ^ost frequently found 

 with the Brandling. 



26 — 32 



19. D. arborea, Eisen. 29^ 30 ^^^^ ^^ '^^^ ^^'"^ Tree-worm. 



29 - 33 



20. D. octoedra, Sav. (= D. boeckii, Eisen). 337:733 



21. D. alpina, Eosa. 39332 



VI. BiMASTUS. 



The worms of this genus are best known by the absence of 

 tuber cula on the girdle- segments, and the absence of sperma- 

 thecse. 



22. Bimastus eiseni, Levinsen. Girdle-segments 25-32. 

 Head like that of Lumbricus castaneus. 



23. B. constricta, Eosa. Girdle, 26 - 31. 



24. B. beddardi, Mich. Girdle (24). 25-31. 



VII. OCTOLASIUM. 



Eather large worms, similar to Allolobophora, but with the 

 setse in eight rows, and girdles resembling Lumbricus. 



25. Octolasium cyaneum, Sav. (= A. studiosa, Eosa). 30^33 



26. 0. lacteum, Oerley (= A. profuga, Eosa). q^t^ 



27. 0. rubidum, Oerley. gQgg - 



28. 0. inter7nedium, Friend, g^^g^ 



29. 0. gracile, Oerley. g^'gg Closely resembles No. 27, 

 but seems to me to be a distinct species. 



