502 



PROF. T. E. JONES AND MR. J. W. KIRKBT ON OSTEACODA OP 



Bairdia nitida, B. prcecisa, and Cythere ? superha ; while Beyrichia 

 craterigera, Kirkhya costata, K. plicata, and Macrocypris Jonesiana 

 are almost peculiar to it, and certainly highly diagnostic of the series. 

 § 3. Carboniferous Limestone Series of South-iuest Scotland. — The 

 shales connected with the limestones of the Lower beds (a) of this 

 series have yielded a great number of Ostracoda — more species, in 

 fact, than any other portion of the Carboniferous system either in 

 Scotland, England, or elsewhere. The following list includes the 

 most common and characteristic forms from these limestones and 

 shales : — 



Oypridina primseva. 



Phillipsiana. 



Entomoconchus Scouleri. 

 Polycope simplex. 



Youngiana. 



Cytherella recta. 



scrobiculata. 



Leperditia Okeni, 

 suborbiculata. 



oblonga. 



■ compressa. 



Armstrongiana. 



Beyrichia fastigiata. 



multiloba. 



radiata. 



tuberculospinosa. 



reticosa. 



Bradyana. 



Beyrichia bituberculata. 



ventricornis. 



Kirkbya perraiana. 

 um.bonata. 



Urei. 



spinosa. 



oblonga. 



Bythocypris Phillipsiana, Tar. carbonica. 

 Bairdia plebeia. 



curta. 



Hisingeri. 



brevis. 



amputata. 



submucronata. 



subelongata. 



Cythere? cuneola. 

 ? cornigera. 



As peculiar to this portion of the series may be mentioned : — 

 Cyjjridina Hunteriana, Cypridellina intermedia, Bradycinetus 

 BanJcinianus. Entomoconchus glohosus, Polycope Youngiana, Cythe- 

 rella brevis, C. concinna, C. obesa, C. rotundata, Leperditia com- 

 pressa, L. Armstrongiana, L. Bosquetiana, Beyrichia colUculus, B. 

 reticosa, B. varicosa, Bairdia amputata, B. grandis, B. ? circumcisa, 

 B. legumen, and Bythocythere Youngiana ; several of these are rare. 



The middle portion of the series (b), containing the workable 

 coals and ironstones, which form the " Lower Coal-measures " of 

 Scotch geology, yield few Ostracods,- and the most common are two 

 Upper-Coal-measure forms. These four species occur in it: — 

 Leperditia Youngiana, Beyrichia sp., Carbonia fabulina, C. RanJci- 

 niana. 



In the Upper-Limestone group of this series (c) many of the 

 species belonging to the Lower group (ct) are recurrent, and a few 

 appear for the first time. The most common forms are : — 



Cypridina Youngiana. 

 Leperditia Okeni. 



suborbiculata. 



Beyrichia radiata. 



bituberculata. 



multiloba. 



ventricornis. 



Kirkbya rigida. 



Urei. 



permiana. 



Cytherella recta. 



Cytherella Benniei. 



Eequalis. 



obliqua. 



scrobiculata. 



Bairdia plebeia. 



• Hisingeri. 



curta. 



siliquoides. 



Cythere? cuneola. 

 ? cornigera. 



