The Myriapods of the Forth Area. 407 



and 16 Millipedes. This is exclusive of a few aliens such 

 as Faradesinits gracilis, that have established themselves 

 in green-houses, etc. That each group will be considerably 

 added to in the course of time may be confidently predicted. 

 Eeference to EUingsen's Norwegian list^ suggests several 

 that might be expected to occur here. 



While it is still the common practice to speak of the 

 Centipedes and Millipedes as forming one class, the 

 Myriapoda, or Myriopoda as some prefer to write it, un- 

 answerable reasons have been given for their separation 

 into three classes, namely — Chilopoda, Symphyla, and 

 Diplopoda (c/. Pocock's paper " On the Classification of the 

 Tracheate Arthropoda," Zoologischer Anzeiger, xvi. (1893) 

 p. 271; and C. H. BoUman's "The Myriapoda of North 

 America," Bidletin U.S. National Museum, No. 46, 1893). 

 But many points in the classification and nomenclature 

 of the Myriapods are by no means settled, and I can only 

 hope that the arrangement and names here employed will 

 not differ materially from those adopted in the authoritative 

 work on the British species when it makes its appearance. 



The identification of Chilopods and Diplopods is, at 

 present, a matter of very considerable difficulty, and, but 

 for the assistance which Mr Pocock kindly gave me four 

 or five years ago, and for which my best thanks are due, 

 this list might never have been drawn up. Specimens of 

 nearly all the species recorded were determined by him. 

 Some exceptionally puzzling questions in synonymy exist, 

 and not having myself investigated them, I simply adopt 

 the names given me by Mr Pocock. To Sir Thomas Gibson- 

 Carmichael, Bart., I am indebted for the equivalents of some 

 of the names used by him in his 1882 list. In Latzel's Die 

 Myriopoden der bsterreichisch-ungarischen Monarchie, 1880- 

 1884, most of the British species are described. 



Myriapods may be found in every month of the year, 

 but spring is in my experience about the best time to seek 

 for them. When the sun has gained sufficient strength 



^Edv. Ellingsen, " Bidrag til Kundskaben om de norske Myriopoder 

 Udbredelse" ((7/im«m?tia Videnshabs-SelskaU Forhandlinger for 1891), and 

 "Mere om norske Myriopoder" {ibid, for 1896 and 1903). 



