328 Dr. & the Rev. S. Graham Brade-Birks on 



lfi. B. quartum, Brade-Birks (to be described later in the 

 present paper). 



$ 7-8 mm. 



While collecting on a slope by the side of the Ashford 

 road, close to the town of Bake well, one of us (H. K. B.-B.) 

 came across a specimen of a square-backed millipede which 

 we recognized in the field as belonging to the family 

 Brachychaeteumidse. Although we searched carefully not 

 only both of us on this, but also one of us on another occasion, 

 we failed to collect another example. It became clear upon 

 examination with the microscope that this specimen could 

 not be referred to any of the three known species ; a descrip- 

 tion is therefore given in another part of this paper. 



1 ? , near Bakewell, H. K. B.-B., 29/v./18. 



Family CraspedosomidsB, Verhoeff, 1909. 



Subfamily Cxaspedosomiitje, Verhoeff, 1909. 



(Tribe CRASPEDUSOMINI, Verhoeff, J 009. 



Genus POLYMICRODON, Verhoeff, 1897. 



Subgenus Polymicrodon (s. str.), Verhoeff, 1897. 



17. P. latzeli (Verhoeff, 1891). 



Syn. Atract.osoma latzeli, Verhoeff, 1891. 

 ? Atractosoma polydesmoides, Leach. 

 ? Atraetosoma latzeli gallicvm, Verhoeff, 1895. 

 ? Craspedosoma latzeli gallicum, Verhoeff, 1896. 

 ? Polymicrodon latzeli gallicum, Verhoeff, 1897. 



17-18 mm. 



A flat-backed animal with thirty body-segments. We 

 have little doubt that this species should be called P. pofy- 

 clesmoides (Leach), but until the type-specimens of Leach's 

 animal are examined it seems unwise for us to make the 

 alteration. The characteristic gonopods are figured by 

 Verhoeff (12), and those of P. latzeli gallicum, which is 

 perhaps a synonym, by llibaut (n). 



*cf <S > Cave Dale, R. S. t in a recent year (J.), G. 3147. 

 We also took specimens almost, certainly referable to this 

 species in the Bakewell district, 1918, but there were no adult 

 males for definite diagnosis. 



