658 A SYNOPSIS OF THE BRITISH PAUROPODA 



Whilst P. danictis occupies a central position between the 

 two Neotropical species P. argentiiiensis, Hansen, and P. 

 inonmtus, Hansen, and the Siamese forms P. elegantulus, 

 Hansen, and P. inodesfus, Hansen, and is somewhat closely 

 allied to those four animals, it is very sharply divided 

 from all known European species. 



British Distribution. — Two males taken from under a 

 board lying on soft earth in the Winter Gardens, Sunderland, 

 February, 19 10. 



Distribution. — Denmark (Hansen), England. The single 

 Danish specimen was captured in a large wood in the Island 

 of Moen, July, 1892. 



Pauropus gracilis, Hansen (Plate xix., figs. 14 and 22-4). 



The form of the anal plate and the third pair of tactile setfe 

 at once separates P. gracilis from P. vulgaris, to which it is 

 somewhat closely related. It is also a smaller and decidedly 

 more slender animal. 



I have taken P. gracilis in large numbers this year in 

 another part of Gibside, and a few specimens on the banks of 

 the Wear near Hylton, at Leamside, and in gardens at New- 

 castle, Sunderland, Hart, and Penshaw. When P. gracilis. 

 occurs amongst frass under the bark of dead trees lying in 

 moist situations, a small white mite may often be seen preying 

 upon it. 



Examples have also been met with at Prestwick Carr and 

 on the north bank of the Tees at Piercebridge, Co. Durham, 

 June, 1910. 



Pauropus vulgaris, Hansen (Plate xix., figs. 15 and 25). 



In my former paper I mentioned the chief characteristics of 

 this distinct form. Further specimens have occurred in the 

 neighbourhood of Penshaw. 



