124 Mr. Weaver 07i the Older Stratified 



Srdly, But there are twenty-four species which occur both 

 in the Cork band of limestone and other transition countries; 

 of these, three species are included in Mr. Murchison's List 

 of Silurian Fossils, derived from the Wenlock limestone, viz. 

 at Ledbury and Dudley ; and two of these occur also at PI3'- 

 mouth, and one in the Eifel and Gothland : they are, Nerita 

 spirnta, Spirifera radiata, and Spirifera octoplicata\ and 

 three others, also derived from the Wenlock limestone, viz. 

 at Dudley, but not included in Mr. Murchison's list; and one 

 of these is found at Blankenheim: viz. Spirifera striata ^JLuom- 

 phalus j)enta7igidaris, and E. catillus. Six other species in 

 the Cork limestone are met with also in home transition lo- 

 calities ; namely, in the Isle of Man, at Ludlow, Plymouth, 

 and Newton Bushel ; and three of them occur also in foreign 

 transition countries, viz. -in the Eifel. at Coblentz, and Blan- 

 kenheim: they are, Pileopsis vetusta ; Product a Scot ica; Spiri- 

 fera distans, S. cuspidata, S. rotundata ; Terehralula pugnus : 

 twelve other species occur in foreign transition countries, viz. 

 Orthoceras striattim ; Nautilus globatus, N. ovatus ; Spirifera 

 ohlata, S. pinguis ; Terebratula crumena, T, sacculus, T. late- 

 ralis, T. laevigata (Schlotheim), T. acuminata ,- Amplexus co- 

 ralloides ; Actinocri?iites 30-dactyhis : these foreign localities 

 being Norway and Sweden, Christiania, Malmoe, Gothland, 

 Hof, Schleitz, Blankenheim, Eifel, Coblentz, Bensberg, Ems, 

 Mont Chatou near Coutances, antl the Catskill Mountains in 

 the state of New York ; countries admitted to be of protozoic 

 origin, and to which Mr. Murchison himself in a great mea- 

 sure refers, when giving an account of his Silurian corals, 

 viz. Sweden, Gothland, Bensberg, Eifel, and the transition 

 regions adjacent to the Rhine, both in Germany and Belgium; 

 as also to Lake Erie and Drummond Island in North Ame- 

 rica. 



4thly, But there are seventeen species in the Cork band of 

 limestone, which have hitherto been noticed elsewhere only in 

 the carboniferous limestone; viz. Asaphus gemmuliferus i Or- 

 thoceras Breynii, O.fusiforme ; Nautilus midticarinatus, N, ca- 

 riniferus, N. sidcatus ; Ampidlaria helicoidcs; Producta Mar- 

 tini, P. co7icinna, P. lobata, P. punctata, P. antiquata, P, 

 ptlicatilis ; Spirifera irigonalis ; Terebratula resupinata, T. 

 cordiforjuis ; Pleurorhynchus hibernicus. 



In further illustration of this subject, I also showed, in the 

 notes to §. 33. of my Memoir on the South of Ireland, that 

 of the genera Producta, Spirifera, and Terebratula^ no less 

 than eighteen other species had been observed, partly in other 

 portions of the British Isles and partly in foreign countries, 

 as common both to the transition and carboniferous systems ; 



