398 Mr. Weaver on the Structure of the South of Ireland, 



In Wenlock limestone. 

 CoNCHiFEEA {continued^. 



Crinoidea 4. 



Marsupiocrinites caslatus. 

 Hypanthocrinites decorus. 

 Himerocrinites decadactylus, 

 icosidactylus. 



POLYPARIA 17. 



Escharina ? angularis. 

 Fhilodictya lanceolata. 

 Hornei-a crassa. 

 Berenicea irregularis. 

 Eschara? scalpelluin. 

 Blumenbachium globosum. 

 Millepora repens. 

 Syringopora reticulata, S. bifur- 



cata, S. filiformis ? S. czespi- 



tosa ? 

 Monticidaria conferta. 

 Acervularia Baltica. 

 Cladocora sulcata. 

 Turbinolopsis bina. 

 Verticillopora? abnormis. 

 Cnemidium tenue. 

 Sedis Incert^ 1. 



Cornulites serpularius. 

 31 Species. 



In Elf el limestone. 



CoNCHiFERA {continued).- 



Pholadomya radiata. 



Isocardia Huniboldtii, I. antiqua. 

 Crinoidea 13. 



Eugeniocrinites mespiliformis. 



Pentacrinites priscus. 



Platycrinites ventricosus. 



WIelocrinites gibbosus. 



Rhodocrinites verus, R.giratus, R. 

 quinquepartitus, R. canalicu- 

 latus, R. crenatus. 



Cupressocrinites crassus, C. graci- 

 lis, C. tesseratus. 



Eucalyptocrinites rosaceus. 

 Polyparia 6. 



Anthophylluin bicostatum. 



Achilleum cariosum. 



Manon cribrosum. 



Scyphia cornu-copiae. 



Coscinopora placenta. 



Lithodendron bicostatum. 



Sedis Incert^ 0. 



71 Species. 



From the preceding tables it results that we have 



In the Wenlock limestone. 



Common species 42 



Common genera but di- 

 stinct species 64 



Distinct genera with di- 

 stinct species 31 



Distinct species — 95 



In the Eifel limestone. 



Common species 42 



Common genera but di- 

 stinct species 96 



Distinct genera with di- 

 stinct species 71 



Distinct species — 167 



Wenlock — total species. . 137 Eife! — total species 209 



From the foregoing review, and the resulting numbers, it 

 becomes clearly apparent, that M. Dumont was not justified 

 in pronouncing the Wenlock and Eifel limestones as of the 

 same formation. It is, however, also evident that they are 

 akin in a certain degree, the species which are common to 

 both limestones being to the total number in each, in the 

 Wenlock limestone as 4 to 13 nearly, that is, forming about 



