408 Mr. R. S. Bagnall on the 



distinct in the structure of the male gone-pods etc., describing 

 one of them as new under the name of Brachyiulus littoralis. 

 The dissection of male examples, however, from an abun- 

 dance of British material proves that all our examples are 

 referable to Verhoeff's species. Surely, by deduction, one 

 must refer the British material to Leach's species, and so 

 sink Verhoeff's name as a synonym. And, further, another 

 name must be found for the pusiUus of Verhoeff (non Leach). 

 The present memoir is an attempt to show my deductions 

 as to the true synonymy of three of Leach's species, from 

 which it will be seen that new names will have to be found 

 for Craspedosoma rawlinsi, Verhoeff (non Leach), and 

 B racily ixdus pusillus, Verhoeff (non Leach). As existing 

 names (now sunk as synonyms) may be found applicable, I 

 leave this question to more capable hands. I have, however, 

 suggested a new name for Craspedosoma simile, Attems (non 

 Verhoeff), the issue in this instance not being complicated 

 by old synonymy. 



Of four of Leach's memoirs on Myriapods containing 

 practically the same subject-matter, I have perused the 

 following : — 



Leach, W. E. 1814-15. "A Tabular View of the Ex- 

 ternal Characters of Four Classes of Animals, which Linne 

 arranged under Insecta ; with the Distribution of the Genera 

 composing Three of these Classes into Orders &c, and 

 Descriptions of several new Genera and Species." In Trans. 

 Linn. Soc. Lond. vol. xi. (1815) pp. 306-400 (Class II. 

 Myriapoda, pp. 376-386). 



Leach, W. E. 1817. " The Characters of the Genera of 

 the Class Myriapoda, with Descriptions of some Species." 

 In the 'Zoological Miscellany,' iii. pp. 36-45 (with 10 

 plates). 



The following extract is from the first of these references : — 



[p. 379] "Spec. 7. Julus pusillus. 



" J. Segmento ultimo subniucranato, corpore cinerascente 

 nigro aut iiisco-brunneo lineis duabus rufescentibus. 



"Long. Corp. 5 ad 6 lin. 



" Habitat prope Edinburgum sub lapidibus ; in Battersea 

 fields, Londinum prope, inter graninum radices. 



" Copulatione observavi. 



