A CARBONIFEROUS FAUNA FROM NOWAJA SEMLJA. 173 



Genus Conocardium Bronn. 



Conocardium rostratum (Martin). (PL II. fig. 40.) 



Hind, loc. cit., vol. i., 1900, p. 453, pi. li. figs. 6-9. 



This species is represented by two small specimens quite complete but for part of 

 the anterior portion. The posterior rostrum of the specimen figured is in the collection, 

 but could not conveniently be photographed along with it. This specimen measures 

 3 "5 mm. dorso-ventrally and 3 mm. from side to side, and owing to its small size I am 

 doubtful as to the degree of importance to be attached to the fact that the lower border 

 is not concave, as in the form figured by Dr Hind, loc. cit., fig. 7, but is rather slightly 

 convex, as in fig. 6, ibid. ; this may be only an appearance due to the incompleteness of 

 the anterior end. 



Conocardium alseforme (J. de C. Sowerby). (PI. II. figs. 41, 41a.) 

 Hind, loc. cit., vol. i., 1900, p. 460, pi. liv. figs. 1-10. 



Conocardium, alseforme is represented by seven specimens in all stages of growth 

 up to about 10 mm. dorso-ventrally, and apparently undistinguishable from the British 

 form, with this exception, that the larger one is slightly less inflated than Sowerby's 

 type. At all events, it seems that the degree of gibbosity of the shell varies even in 

 typical Lower Carboniferous districts — since a specimen of Conocardium alseforme 

 figured by de Koninck is appreciably compressed laterally.* 



Class SCAPHOPODA. 

 The collection contains a specifically indeterminable Dentaliid. 



Class GASTEROPODA. 



The Gasteropod fauna of the Cape Cherney limestone is very varied, but the greater 

 number of the species is represented by extremely small specimens, as if some 

 pauperising influences had arrested their normal development. In those cases where 

 the types of the species which I believe to be present here are actually minute forms, 

 my identifications will probably be found to be fairly correct, but it is not without some 

 misgiving that I have made bold to compare some of these small fossils with common 

 west of Europe species, although these have been founded on large specimens. Yet 

 resemblance is often so striking — except in matter of size — that the latter course is 

 perhaps after all the safest. 



* Faune du Calcaire Carbonifere de la Belgique, 1885, vol. v. pi. xviii. fig. 17. 



