Page:The Zoologist, 4th series, vol 1 (1897).djvu/484

1	Rubellus	27	28	29	30	31	32
2	Castaneus		28	29	30	31	32	33
3	Melibœus			29	30	31	32	33
[4	Tyrtæus				30	31	32	33	34	35]
5	Studeri					31	32	33	34	35	36	37
6	Herculeus						32	33	34	35	36	37
7	Papillosus							33	34	35	36	37	(38)
8	Festivus								34	35	36	37	38	39

In October, 1893, I remarked ('Naturalist,' p. 296) that L. tyrtæus was probably the same as Allolobophora profuga, and now Dr. Ribaucourt supports my suspicion, though he does not amalgamate the two. The accompanying table or chart gives a bird's-eye view of the British species of the genus which will be helpful to collectors: —

II. Genus Allolobophora.

The members of this genus fall more or less naturally into groups, of which the Dendrobæna is the best defined. As a whole the species of this genus may be known by the lip being only partially dovetailed into the 1st segment. There is a curious exception to this rule in A. eiseni, which has the head arrange-