102 



ME. L. M. PARSON'S ON THE CAKBONIFEROUS [vol. Ixxiii, 



2. D2; the sub-zone of Lonsdalia jioriformis. 



The following characters of the Leicestershire fauna illustrate 

 general similarities of this sub-zone in the two districts : — The 

 presence of CampopliijUum derhiense, Cyatliopliyllum regium, 

 Lithostrotion irregulare, L. portlocki, Zaphrenticls in the upper- 

 most beds, the great number of variants ^f Froductus giganteus, 



Fig. 3. 



)MatIock Bat 

 Wirksworth 



. Ashbourne 



\^ 



'r<; 



~'-°^ 



% 



Sketch-map 



showing the topographical position 



of the Leicestershire Area 



relative to 



the Waterhouses Development 



Scale of Miles 

 o s 10 



the occurrence of scabriculate and punctate Prodiicti besides i-epre- 

 sentatives of the Martinia group (particularly M. glabra), and 

 the occurrence of Splrifer hisulcatus and Spirifer planicosta. 

 In the following respects the fauna in Leicestershire differs from 

 that of Derbyshire : — Lithostrotion junceum occurs in Leicester- 

 shire only in the upper beds as at Ticknall, and other species such 

 as X. martini, L. aff. m''coganu)n, and L. jtemingi are apparently 

 absent. DihunophyUa of an advanced type are not commonly 

 found : D. matlockense^ common in Derbyshire, being unrecorded 

 from any of the inliers that I have described. Z>. derhiense is 

 also absent, but D. m airhead i, a species that does not figure in 

 Prof. Sibly's faunal lists, is of limited occurrence at Ticknall. In 

 comparing the coral faimas of the two districts due allowance 



