Lower-Garhoniferous Entomostraca. By T. R. Jones. 321 



together (the carapace) would be lanceolate, the lateral convexity 

 being small. 



This form approximates to several Carboniferous Cytherce 

 (unpublished), and indeed to some other fossil as well as living 

 forms. It is very close to C. Jonesiana, Kirkby ; but in the 

 latter the greatest convexity of the dorsal line is medial and 

 not posterior ; and its valves are more convex in profile. This 

 Tuedian form, now recognised as a new species, I name after my 

 friend and fellow-worker, Mr J. W. Kirkby, of Ashgrove, near 

 Windygates, Fife. 



From a Tuedian Shale ('* E " at page 316), Banks of the Leet 

 near Coldstream, with Leperditia Scotolurdigalensis. 



4. Oarbonia fabulina, J. & K,, var. 

 PI. IT., figs. 2a, 2b, 2c. 



At page 318 some remarks on Carhonia, and references to its 

 published definition, were made in comparing Bernix Tatei with 

 that genus. In the little piece of ironstone marked " G" (page 

 314) from the lower part of the Mountain-limestone at Belling- 

 ham, is a good specimen and well preserved, except that the 

 antero -ventral margin has been broken.'''' Length 1-5 millims. 

 Some uncertainty occurred on account of this interfer- 

 ence with its natural outline, and inadvertently the specimen was 

 figured in the plate with its hind end upwards, in view at first of 

 its belonging to a different genus. 



There is certainly some little difference in shape between this 

 and the ordinary Carboniferous Carlonioe ;f but they have a con- 

 siderable range of variability, and might well be extended to 

 include this stout form. The appearance, however, of the right 

 valve being larger than the left in our specimen, the distinct 

 punctation, the central spot (though only of a slightly darker 

 tint), and the relatively true profiles, leave no doubt of the 

 specific identity. 



5. Lepebditia Scotobtjrdigalensis (Hibbert). 

 PI. II., figs. 7 and 9. 



6. Lepebditia subbecta (Portlock). 

 PI. II., fig. 8. 



These are regarded as dwarf and poorly developed varieties of 



* This fracture has caused the strong obliquity on the right hand lower 

 part of the figure 2a. 



t See "Ann. M. N. H.", ser. 5., vol. iv., pi. 2. 



Ol 



