124 Triend: A Revised List of British Earthworms. 
3. L. castaneus Savigny. The smallest member of the 
as ma . 98 - 33 
sie in Gt Britain. Gilet ocrt 
L. festivus Savigny (L. rubescens Friend).—Very similar 
ue) No.2 , but possessing papille on XV., and having the formula 
= = 
5. L. papillosus Friend (L. Friendi Cognetti).—Found only 
in Ireland, among the British Isles. Recognised by its five 
33 - 37 
girdle sesmrents 5.7: 
Il. GENUS ALLOLOBOPHORA EISEN. 
Prostomium partially dovetailed into peristomium. Girdle 
segments variable in number, mostly possessed of tubercula 
pubertatis. Setae eight on each segment, either in couples or 
variously distributed. Colour ranging from pink through 
brown, clay colour, steel blue and green; seldom purple or 
iridescent. Usually cylindrical throughout. Exude slime or 
turbid fluid, often pungent, foetid, or earthy. 
The external characters of this genus are so vague and v aried, 
that resort has been had to the internal structure, and as a 
result several sub-genera have been formed. These are not yet 
clearly defined ; partly owing to the difficulty of working out 
the minuter characters, and partly because new species have 
had to be described with insufficient material for full internal 
diagnosis. I do not follow Michaelsen and some others in all 
their conclusions, because my independent researches on 
British species will not allow me. The following arrangement, 
however, is subject to further revision and extension when I 
have the leisure to complete my investigations. 
(1) Genus Allolobophora. 
Prostomium dovetailed into peristomium. Male pores 
on papillae; setae in pairs; body cylindrical, brown, clay 
coloured or pink. Earthy smell, slimy, no turbid fluid. Four 
pairs of seminal vesicles ; gonads free. The type is that form 
of worm which has so often been confused with the true earth- 
worm, but which is readily distinguished by the shape of the 
head, the colour, the position of the girdle, and the internal 
structure. 
5. A. longa Ude.—Girdle A Usually dark brown or 
umber ; tail often flattened asin Lumbricus. Very earthy smell. 
6. A. trapezoides Dugés. This and the next often with 
difficulty distinguished, and may perhaps still be regarded as 
different forms of one species. But there is great interest in 
this fact, for while the form here referred to has the continuous 
band of the true Allolobophora, No.7 links us on to A porrecto- 
a7 - 34 
cee ae 
Naturalist, 
dea by the discontinuous form of tubercula. Girdle 
