Myriapoda from Derbyshire. 



3X) 



III. Descriptions of the Two New Millipedes 



RECORDED ABOVE, WITH NOTES. 



Brachychceteuma quart um, sp. n. 



Dimensions approximately the same as those of the known 

 species. Ocelli present, well but irregularly pigmented, few 

 in number — three. The other external characters and the 

 mouth-parts agreeing with the type of the genus. Male 

 unknown. 



Female. — The female presents the usual sexual differences. 



The vulvas. — In the " cyphopodite " the ehitinization, both 

 of the pilose lateral lobes (fig. 1, ex, in) and of the naked 

 posterior lobe {pi), is well marked. The posterior lobe is 



Fiff. 1. 



Brachychceteuma quartum, posterior view of the right vulva, ex, in, 

 external and internal lobes of the "cyphopodite": pi. posterior 

 lobe, x 200. H. K. B.-B. del. 



simple in form, and is neither provided with a marked 

 median elevation nor with lateral folds of chitin, though, as 

 usual, the chitin of the posterior lobe as a whole is stouter 

 than that of the rest of the organ. When viewed from 

 behind the distal limit of the posterior lobe is almost flat and 

 its lateral borders are simple, being convex in profile. From 

 the same point of view a strong band of chitin is seen to 

 arise from the external edge of the lobe at the height of its 

 convexity ; this band passes transversely towards the internal 

 edge, and, losing its definition, hardly unites with it. A 



