64 Pemer & Kodym — Zonal Division and 



tainty in delimitation of E 1? but also to the similar aspect 

 of the limestones occurring both in E^ and in E 2 . 17 



After collecting at the chief localities with due regard 

 to the present boundaries between Ej_ and E 2 , and com- 

 paring with Barrande's material, I was able to compile 

 the following list of the more important fossils found in 

 E x and E 2 , indicating their true range. Graptolites which 

 have been treated more in detail in describing the E 2 

 zones are omitted here, but special attention is given to 

 other fossils which have not been known at all from E x or 

 not with certainty, and which occur in the limestones. 

 The fauna of E l7 as it is now delimited, therefore appears 

 much richer than has hitherto been supposed. 



Cephalopoda: Cyvtocevas abstinens CE^ 18 , f ormidandum (1-2) , 

 I epidum (1-2), nigrum (1-2), phillipsi (1) , pluios (1-2), potens(l), 

 serration (1), sup erbum (1-2), vestitum(l), victor (1) ; Gompho- 

 ceras ag as sizi (1-2), amygdala (1-2), at rophum (1-2), billingsi 

 (1-2), bohemicum (1-2), clava (1-2), contr avium (1-2) , Jialli (1-2), 

 imp eviale (1-2), mumia (1-2), nucifovme (1-2), ovum (1-2), vigi- 

 dum (1-2), sphrnvo soma (1-2), vespa (1-2) ; Ophidiocevas amissus 

 (1), proximus (1) , rudens (1-2), tener (1-2) ; Orthoceras cequabile 

 (1), annulatum Sow. (1-2), b ohemicum (1-2) , compulsum (1-2), 

 cuvvens (1-2), decuvtatum (1-2) , docens (1-2), duponti (1-2), egve- 

 gium (1-2), endymion (1-2), epidans(l), extensum(l), gevmanum 

 (1-2), illudens(l), inchoatum (1-2) , innotatum (1-2), jucun- 

 dum ( 1-2 ) , magister ( 1-2 ) , minus ( 1-2 ) , murchisoni ( 1-2 ) , particeps 

 (1-2), pectinatum(l), poculum (1-2), pseudocalamiteum (1-2) , 

 simois(l), socium (1-2), steiningeri (1-2), tenuicinctum(l) , tran- 

 siens (1-2), trecentesimum(l) ; Phragmoceras callistoma (1-2), 

 imbricatum (1) , panderi(l), perversum(l) ; Trochoceras amicum 

 (1), nodosum (1-2) , placidum (1-2) , pulchrum (1-2?) . 



Gastropoda: Cirropsis bohemica Per. (1-2), G. disjunct a 

 Per. (1-2), C. pvcEstans Per. (1-2), Conotoma eximia(l), Con- 

 vadella inopinata(l), Cyvtolites evemita(l) y C. eximius(l), 

 C. tuboides(l), Dyevia car ens (1), Epiptychia dusli Per. (1), 

 Euvyzone tuboides Per.(l), Holopea ivvegidavis(l), Naticopsis 



11 In the latter period of his paleontological activity, Barrande used to 

 refer the majority of the Silurian fossils imbedded in limestone to E 2 , although 

 his collectors, workers in quarries, who brought the fossils to Prague, were 

 getting them chiefly from E x limestones, which on the old weathered 

 exposures yielded the fine, entire specimens with well preserved sculpture, 

 such as are now' seen in the Bohemian Museum. Many such rich localities 

 have disappeared or become nearly inaccessible; others yield from the fresh 

 exposures chiefly fragments, hardly determinable, so that it is now a difficult 

 task to ascertain the true horizon of all Barrande's species. 



18 The author is Barrande, unless otherwise stated. To save further space, 

 E x and E 2 are hereafter written simply 1 and 2. 



