GENERAL EXPLANATIONS 



Roman numerals I to XXXIV refer to somites. 



The letters a, b, c and d with Arabic numerals refer to the annuli. 



For a full explanation see pages 17 to 19. 



The cutaneous papillae are designated as follows : 



dip dorso-lateral 



dmp dorso-marginal 



mdp dorso-median 



mp median 



smp supra-marginal 



The metameric sensillae are designated as follows : — 



dl dorso-lateral 



dm ' dorso-marginal 



md dorso-median 



sbm sub-marginal 



sm supra-marginal 



vl ventro-marginal 



vm v'entro-median 



$ Male, or the external opening of the male genital organs 



or its position. 

 9 Female, or the external opening of the female genital 



organs or its position. 



Special legends will be found in the explanations of the respective 

 plates. 



