A SYNOPSIS OF THE BRITISH SVMPHYLA 1 7 



A Synopsis of the British Symphyla, with descriptions of 

 New Species. 

 By Richard S. Bagnall, F.E.S., F.L.S. 

 (With Plate I.). 

 In a recent paper published in these Transactions (iii., 

 pp. 646-653, pi. xix., figs. 1-10, 1910) I dealt with four 

 species of Symphyla, three of which were for the first time 

 recorded from the British Isles. I did not then anticipate 

 following up the study, but in my spare time collecting 

 throughout the spring of this year I met with numerous 

 examples of the order from various localities in the North of 

 England, and many of these proved of exceptional interest on 

 microscopic examination. In July I was able to add to this 

 collection examples taken from two localities on the West 

 Coast of Scotland. The material thus brought together 

 mainly forms the subject of the present contribution. 



Briefly, five species of Scutigerella are recognized, of which 

 three are new to science, whilst of the seven species of Scolo- 

 pendrella three also are new. In some of these forms structural 

 characters that were unknown in previously described species 

 have been discovered, namely the peculiar flap-like processes 

 on the posterior margin of the 13th scutum in Scutigerella 

 biscutata, and the peculiar characteristic setae in S. hanseni. 



Up to a year ago but one species was recognized as British ; 

 in the present synopsis we deal with no less than twelve 

 distinct forms and a variety, all of which, with the exception of 

 S. notacantha, are recorded from the counties of Northumber- 

 land and Durham, and five of which we have also discovered 

 in Scotland. Scutigerella biscutata sp. nov., S. spinipes sp. 

 nov., S. hanseni sp. nov., Scolopendrella subnuda Hansen, 

 S. horfida sp. nov., S. delicatula sp. nov., 6". isabellce Grassi, 

 and its var. dunelmensis nov., and S. minutissima sp. nov., 

 are for the first time recorded from the British Isles. 



I must confess that I have experienced some considerable 

 surprise at the richness of the Symphylous fauna of the North 

 of England, and I find it difficult to explain, and still more 

 difficult to estimate the probable number of species that may 



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