302 RET. H. FKIEND ON THE 



Synonym : Allolohophora arlorea, Eisen (Om Stand. Lumb. 

 1873). 



English records : — Gloucester (Painswick, Mr. "Watkins, 1892) ; 

 Sussex (Dallington, 1892) ; Yorkshire (Esholt, 1891) ; Norfolk 

 (Norwich, Mr. A. Mayfield, 1892). On the Contiueut Eisen 

 records its occurrence in " Skane, Yestergotland och Yalders 

 i Norge." He refers to it as the rarest of Swedish worms. 

 I cannot find any record up till the present date for Germany, 

 Italy, or Hungary. Dr. Eosa seems not to have met with it. 



6. A. (DENDROBiEJfA) EisENi, Levinseti. (PL XXI. figs. 7, 10.) 



Hitherto this worm has happily passed through the hands of 

 systematists invariably as Lumhricus Eiseni, Levinsen; but the 

 time has come when it must be removed from the false position it 

 has occupied undisturbed till the present. It must, however, 

 be admitted that it does not fit in with the genus Allolohophora, 

 though it belongs to this place as a true tree-worm. 



The worm is small, cylindrical, slightly attenuated, usually 

 about an inch, or at most an inch and a half, in length, i. e. 30 to 

 40 millim. Its prostomium, like that of the true Lumhricus, 

 forms with the peristomium a perfect mortise and tenon. It 

 often closel}'' resembles the typical Lumhricus in colour, being a 

 warm brown, frequently with iridescence, and has the setae in 

 couples somewhat close together. These are its only affinities in 

 that direction. It lives in old trunks o£ trees and among decay- 

 ing timber or woodland debris, is small, destitute of the two 

 pairs of spermathecae which every true Lumhricus possesses, and 

 in the matter of clitellum and its accessories is separated very 

 widely from that genus. 



The girdle covers eight segments, extending from 24 to 31 ; 

 total number of segments 90-110. There are no tiihercula 

 puhertatis ; the male pore on segment 15 is on papillae slightly 

 developed, and the first dorsal {jore is between 5 and 6. The 

 constancy of this feature in the deudrobaenic group is striking. 

 Eosa submitted specimens exactly answering this description to 

 Levinsen, who stated that they were identical with his Lum- 

 hricus Eiseni*. The original specimens from Copenhagen were 

 taken, according to Eosa's translation of Levinsen's account, 

 from old trees, and my English specimens have been obtained 

 from similar habitats. 



* BoUetino Mus. Zool. ed. Anat. 1887, 1889. 



