TREE-WOEMS OF GREAT BRITAIN. 303 



Synonym : Lumbriciis Eiseni, Levinsen (Syst. geogr. Oversigt 

 over de nord. ann. &c., Copenhagen, 1883). 



Found in the following localities in England : — Cumberland 

 (Carlisle, 1890) ; Grloucestershire (Painswick, Mr. Watkins, 

 1892, see ' Nature,' February 18th, 1892); Sussex (Dailington, 

 March 1892) ; Epping Forest. The Continental records are 

 Copenhagen, Azores ?, Piedmont, and Eivarossa. 



We are now prepared for a survey of the principal charac- 

 teristics of the group. 



§ Dendeob^na, Eisen. 



Small tender worms, from 1 to 2| inches in length, found in 

 decaying trees, among dead leaves, and rotten vegetable matter ; 

 sometimes wandering to other habitats. Colour usually brown, 

 rose-red, or flesh, with dull clitellum and lighter under surface. 

 Prostomium more or less deeply imbedded in the peristomium, 

 which is without setae. Setae always in eight rows or in four 

 couples, more or less distant, making the body appear rectan- 

 gular. 



Grirdle occupying five to eight segments, commencing some- 

 where between the 24th and 31st. 



Male or spermiducal pores on segment 15, usually with pro- 

 minent papillae, which sometimes extend over the two adjoining 

 segments. 



Tuhercula puhertatis in two or three pairs on consecutive 

 segments ; not observed in one species. 



First dorsal pore usually between segments 5 and 6. Sper- 

 matophores between the male pore and the clitellum. 



The internal characters have not yet been made out with 

 sufficient accuracy by any investigator to allow of classification. 

 Spermathecae are present in some species, but absent from others. 

 "When present they open in the direction of the superior pair of 

 setae {Rosa). 



Usually secreting a small quantity of yellow fluid from the 

 dorsal pores. 



The accompanying table (p. 304) supplies in concise form the 

 principal distinguishing features of this interesting group of 

 worms. 



