﻿Dr. Feistmantel — Bohemian Coal Fauna and Passage-Beds. 105 



Cambridge Greensand, is a singular fact, when we consider that the 

 BuUmina and Textularia of this deposit are usually very coarse 

 arenaceous examples of these genera. The preceding observations 

 leave no doubt however as to the existence of a Foraminifer so 

 similar externally to TrocJtammina irregularis, as to be superficially 

 un distinguishable from it, and which yet possesses a purely non- 

 arenaceous and unmistakably tubulated test ; and thus is added 

 another example to the already existing list of species which may be 

 like one another in all else, and yet differ in the arenaceous or non- 

 arenaceous character of their walls. 



Some day, perhaps, the barrier between the arenaceous and non- 

 arenaceous Foraminifera may be broken down as an artificial separa- 

 tion of closely-allied forms, but on this point I may not say more 

 now, lest I should seem to be making premature use of the information 

 about to be published by Mr. Garter, ^ and which he has most kindly 

 furnished me with beforehand. 



EXPLANATION OF PLATE VL 



Figs. 1 to 3. Webbina Icevis, mihi. 



1. — Outline of a specimen grown around the corner of a small angular fragment of 

 coprolite. c, the solid angle of the coprolite (x 40). 



2. — Outline of a specimen consisting of three chambers, which are defined from one 

 another by slight constrictions merely (x 40). 



3. — Outline of a specimen grown over the curved edge of a minute piece of cop- 

 rolite (x 40). 



Figs. 4 to 7 and 9. W. ttiberculata, mihi. 



4. —Profile outline of a specimen showing the tubercles, t, and the anterior tubular 

 prolongation,^, ending in the open mouth, m (x 40). 



5. — Tubercles represented in plan (x 140). 



6. — Tubercles shown in elevation from a lateral view^ (x 140). 



7. — Section across a specimen adherent to a fragment of coprolite, imbedded in a 

 subsequent deposit of coprolite within the cloaca of a Ventriculite ( V. mnm- 

 onillaris). t and ;;', tubercles ; I, thin calcareous lamina, covering over a part 

 of the surface of adherence, d [x 104). 



8.— Tubulated wall of the test of 7r<?i5mrt (x 540). 



9. — Single tubercular column of W. tubermlata shown in longitudinal section, with 

 the adjacent tubulated walls of the test, y, axial canal with simple outline 

 exteriorly and uncJulating in the inner cone; e, outer projecting cone; ?, 

 inner part of the column ; m, mound produced by accumulation of the sub- 

 stance of the test about the projecting cone (x 540). 



IV. — Geological and Historical Notes on the Occurrence of a 

 Fauna, Chiefly of Permian Affinities, Associated with a 

 Carboniferous Flora in Gas-coal in the Uppermost Portion 

 of the Bohemian Coal-strata.^ 



By Ottokar Feistmantel, M.D., 

 Of the Geological Survey of India. 



S Dr. Anton Fritsch of Prague has brought the relics of Permian 

 animals (Sauria and Fishes) from the Gas-coal of Niirschan * 

 and from the " Schwarte," * near Eakonitz,^ before the Meeting of 



1 Vide Ann. and Mag. Nat. Hist, for March. 



2 "For a notice of the Animal-remains from the Gas-coal of Nyran near Pilsen and 

 Kounovk near Rakonitz see Geol. Mag. 1876, Vol. III. Decade II. pp. 33-34. 



3 In the Pilsen Coal-basin, S.W. Bohemia. 

 * The local name for a kind of Gas-coal. 



^ In the Kladno-Kakonitz Coal-basin, N.W. of Prague, Bohemia. 



