126 Friend: A Revised List of British Earthworms. 
in decaying timber and dead trees. It is an.interesting group, 
but recent discoveries show the need of fuller and clearer 
definition, and the order is only tentative. In the type there 
are three pairs of seminal vesicles. The setae are more or less 
distant, and the colour is usually dark red or purple on the 
dorsal surface. 
15. D. mammals Savigny (=D. Celttca Rosa).—Formula 
Beeb 
33 - 34° 
16. D. submontana Vejdovsky.—Formula a Found 
at Kew, September, 1909 (See Gardeners’ Chronicle, January 
29th roto). 
17. D. subrubicunda Eisen.—Formula a. Abundant 
in leaf-mould. 
18. D. arborea Eisen.—Formula a A smaller form 
than the last, and more frequently found in dead trees. 
19. D. octoedva Savigny (=D. boecki Eisen).—Formula 
29 - 33 
31 - 83° 
(5) Genus Bimastus Moore. 
Wanting in tubercula pubertatis. Along with this negative 
character we find also the absence of spermathecae. Three 
species are at present arranged under this genus. 
20. B. Eisent Levinsen.—Formerly regarded as a member 
of the genus Lumbricus because it has the type of head which is 
characteristic of that genus. Girdle extends from the 25th 
to the 32nd segment. 
21. B. constricta Rosa; girdle from 26 to 31. 
22. B. Beddardi Michaelsen.—At present found only in 
Ireland. This and Southern’s species relictus are unknown 
to me. I have not confirmed Cérley’s record for A. platyura. 
(6) Genus Octolasium Cérley. 
Rather large worms with the setae wide apart. Four pairs 
of seminal vesicles, with four seminal capsules. 
O. cyaneum Savigny (= A. studiosa Rosa).—Formula 
2S. 
29 - 34 
30 - 33° 
24. O. lacteum CErley (=A. profuga Rosa).—Formula 
eae 
31 - 3st 5 ‘ 
‘ 2 30) 4.35 : 
25. O. rubidum Erley.—Formula 5,—3:, said to have been 
found by GEérley at Woolwich. 
: . ~ D8 - 35 ~ : 
26. O intermedium Friend.—Formula 5—3,. Found in 
Oxford Botanic Garden (see Gardeners’ Chronicle, November 
27th, 1900). 
O. gracile CErley.—Formula as number 25. I have found 
this form during the past year, and have given an account of 
the two in Gardeners’ Chronicle, June, 11th, rgto. 
Naturalist, 
