GOPPERT ON THE TRANSITION FLORA OF SILESIA. 37 



in sucli considerable quantity that they sometimes appear entirely to 

 compose the beds in which they occur. 



The quarries situated north of Leobschiitz, especially at the Stein- 

 miihle, near Berndau, as also the three at Kittelwitz, aiford the greatest 

 proportion ; and indeed from thence I obtained the largest portion of 

 my collection. The grauwacke-slates proper on the other hand are 

 very poor, and only here and there have I found Calamites in the 

 black, more or less siliceous or argillaceous roofing-slate, in the quarries 

 half a league behind Gratz near Troppau. The slate quarry at Hein- 

 zendorf beyond Olbersdorf, situated within the primary clay-slate di- 

 strict, is quite destitute of vegetable organic remains. 



It was most interesting to me to find throughout this district, not 

 only some species generally distributed, but also such as I had hitherto 

 observed only in the alhed formation of Landeshut, Glatzisch Falken- 

 berg, Hausdorf and Altwasser, and which it has in common with the 

 oldest coal formation. To these latter belongs Stiffmariajicoides, which 

 occurs in the Leobschiitz quarries, and at Gratz near Troppau, Mocker, 

 Lasitz and Dirschel, but nowhere so abundant and in such distinct 

 specimens as at Landeshut ; but, from the softness of the clay beds, I 

 never succeeded in obtaining a good hard cabinet-specimen. The 

 Sagenaria aculeata, Presl, is found in the quarry at Dobrislawitz, 

 on the right bank of the Oppa, right opposite to the Weinberg of 

 Hultschin, also Calamites canncefonnis ; much more plentiful, how- 

 ever, in Landeshut than here. Widely distributed and to be regarded as 

 typical of the Silesian grauwacke are two species, Calamites transitionis 

 and C. distans, Gopp., the former distinguished by the longitudinal 

 ribs not dying out at, but extending over the joints, the latter by the 

 ribs standing remarkably distant one from another. These have been 

 found in fragments nearly everywhere, and even in quarries destitute 

 of all other plants, as for example, besides the above-cited places, in 

 the grauwacke at Tost. At the same time with these, especially in 

 the soft clay beds, occur delicate linear leaves with parallel veins, of 

 which, however, I found only a few specimens, somewhat perfect, but 

 not once fixed on stalks. I provisionally name them Noeggerathia 

 pusilla. Less widely distributed, and found only in the Spitalmiihle 

 quarry near Berndau, but occurring more plentifully in Landeshut, is 

 a Calamite, which from its stigmaria-like scars I call Calamites stig- 

 marioides ; another, long-jointed, no joint being found in a length of a 

 foot and a half ; the excessively delicate Hymenophyllites Gersdorfii, 

 from the first quarry near Kittelwitz ; the Sagenaria polymorphay 

 Gopp., from the Steinmiihle quarry near Berndau, occurring also in 

 Landeshut ; the remarkable Pachyphloeus tetragonus from the third 

 or southernmost quarry near Kittelwitz, and at Dirschel, Mocker, and 

 Lasitz, also in Altwasser and Landeshut. In addition to Knorria 

 im,bricata, St., from Landeshut, four new and as yet undescribed 

 species of this genus are here noticed. 



When the black globular concretions, occurring in the grauwacke, 

 are somewhat compressed, they bear a resemblance to some nut-like 

 fruits, but are quite destitute of anything like organization. 



The following is a catalogue of the plants hitherto observed in the 



