294 EEV. H. TEIEND ON THE 



Eiosa, iior Benliam has seen tlie force of this character. Almost 

 without exception do we find that the species of Allolohophora, 

 as classified bj Eisen, which have the setse widely separated, are 

 dendrobsenic in character. It is true that I shall have to deal 

 with one exception, but this is due to the fact that we are not 

 yet acquainted with all the species which exist, and cannot there- 

 fore assign those with which we are familiar their exact position, 

 I show further on* that in the genus Lumhricus we have 

 always a perfect mortise and tenon arraogement of the anterior 

 segments, a girdle composed of six segments, four of which bear 

 the tubercula puhertaiis, while the colour is purple-brown with 

 iridescence, and the worms secrete no pigmented substance from 

 the dorsal pores. The genus Allolohophora, as at present under- 

 stood, includes worms of very varied characters, and I find that 

 our British species fall readily into groups, of which I propose 

 to name three as follows : — 



§ 1. LuMBEicoiDEA. Type Allolohopliora Tonga, Ude. 

 § 2. MuciDA. Type Allolohophora mucosa, Eisen. 

 § 3. Dendrob^na. Type Allolohophora celtica, E.osa. 



There are two or tliree species which do not fit into either 

 of these groups, but their classification has been temporarily set 

 forth by Dr. Eosa. Now 1 do not intend at present to touch 

 upon the first two groups. They have certain well-marked 

 characters which, will justify, in time, their erection into new 

 subgenera f. For the present we will deal only with section 3. 

 In so doing I shall be compelled to bring one of the species 

 out of the genus Lumhricus, and two or three from Eisen's 

 genus Allolohophora. The characters of the group will be 

 better understood when the different species have been dis- 

 cussed. Grenerally speaking, however, we may say that the 

 worms are rose-red or flesh-coloured, small, with setas more or 

 less widely separated, arboreal in character, or found usually in 

 and about decaying timber or tree refuse. 



I have named Allolohophora celtica, Kosa, as the type. liosa's 

 original description J was based upon three living specimens 



* " On a Species of Lmkbricus new to Science," infra, p. 306. 



t See Eosa's 'Lumbrici del Piemonte,' where some of these points are 

 more fully treated. 



:!: ' Bolletiuo del Musei di Zool. ed Anat. Comp. Torino,' vol. i. no. 2, April 

 1886, 



