the Devonian Bocks of Moravia. 77 



fossils were collected from Rittberg, to the SAV. of Olmutz, by 

 M. Geveril and Koch, and having been sent to the young M. 

 Hbrnes of Vienna to be named, my friend Count Keyserling at 

 once said that they must belong to a Devonian group. Still 

 the tract required examination, and it is after a circuit by 

 Nebetein to Grosse, Luttein, Rittberg, Cyllechowitz, and 

 Ollscham, and after collecting a good many fossils, that we 

 came to the conclusion without a doubt, that these rocks be- 

 long to the Devonian system. The fossils which have been 

 scrupulously examined, are Bronteus, two species, Trilobite 

 (pygidium only of a small species), Turritella, Macrocheilus, 

 closely allied to the M. arculatus, and to the species of the 

 Hartz, Bellerophen tuberculatus, Maclurites, (species undeter- 

 mined), Euomjjhahis two species, one of which most resemble 

 one of the Eifel, Lucina proavia, L. Diifrenoyi, andt wo 

 other species, Modiola (species imdetermined), Terebratula re- 

 ticularis, T. concentrica (small variety), T. pugnus (a variety 

 ■which occurs in the Hartz, T. mycrorynclius f) T. smooth spe- 

 cies of the T. virgo, Strigocephalus Bm-iini, Spirifer heteroclittis, 

 S. species undetermined, Leptcena depressa, Porites inter- 

 stincta, Favosites Gothlandica, T. spongites, Lithodendron 

 cocspitosiim, Cyathophyllum turbinatum, Fenestella antiqua, 

 Cystiphyllum, &c. 



In these fossils we recognise at once, some of the most 

 characteristic types of the Devonian age, such as the Strigo- 

 cephalus, associated with Lithodendron csespitosum, and 

 others, which are above named in italics. The trilobites and 

 chambered shells of the upper Silurian I'oclis, are no lono-er 

 present, and with the exception of two or three shells, and 

 a few corals which are common to the upper Silurian and De- 

 vonian, the type is on the whole very distinct ; no really 

 characteristic Silurian species being present, and the Cateni- 

 pora escharoides, that true Silurian coral, not being observ- 

 able. 



As to the character of the limestones of Olmutz, I would 

 repeat tlie observation which has been made by Professor 

 Sedgwick and myself, as to the British and Rhenish deposits 

 of the same age, viz. : — that though of posterior date, they 

 have often a more ancient aspect, and more resemble pri- 



