418 Miss H. K. Brade and the Rev. S. G. Birkson 



ratliev bleak. Some little distance away, however, there are 

 several well-wooded areas. 



The rocks o£ the neighbourhood are Carboniferous sand- 

 stones and shales. There is Carboniferous Limestone not 

 more than 3 miles distant in a southerly direction. 



jj 2. Systematic Position. 



This species takes its place in the family Julidse, being 

 referred to the genus Cylhidroiulus [Juliis s. 1.) and subgenus 

 Leucoiulus, 



3. Some External Characters. 



(a) Dimensions. 



Dr. Verhoeff (loc. cit.) gives the following dimensions : — 



Male : length 15-20 mm. ; breadth l-U-1-3 n)m. 



Female : length 18-24 mm., less often U|) to 29 mm. (as 

 in the case of one example 2 mm. broad) ; breadih l"3-2'0 mm. 



The dimensions of three males taken at Winkhill in 1915 

 arc : — 



Length 14-20 mm.; breadth 1*0-1"3 ram. 



And of three females taken at the same place in 1916 : — 



Length 22-24 mm. ; breadth 1-6-1*8 mm. 



(b) Colour-markings etc. 



The exoskeleton is brightly polished. Each pleurotergite 

 of the trunk is composed, as usual, of a narrow anterior pro- 

 zonite (fig. 2, j)) find a broader posterior metazonite (fig. 2, m). 



In our specimens the general tone of colour is brownish, 

 but the shade varies verj' much in different specimens from 

 quite dark to fairly light; above the level of the foramina 

 the pleurotergites are relatively dark, and dorsally the seg- 

 ments are distinctly mottled by patches of a greyish tone ; 

 passing ventrally the somites get much lighter, and so the 

 mottled appearance is practically absorbed by the general 

 tone of colour. At the level of the foramina a row of distinct 

 brown spots may be seen running along each side of the 

 body. These spots occur on each of the metazonites except 

 those of the first few and last few segments. 



Frons and vertex without grooves. 



The prozonites are smooth. 



The metazonites are marked with longitudinal grooves set 

 widely apart, but these grooves are wanting on the dorsal 

 portions of the most anterior segments (fig. 1). 



The ventral plates (sternites) are sin) pie and insignificant. 



