THE PERMO-TIIIASSIC BOUNDARY. 
53 
One species of Bellerophon {B. cf. Vaceki Bittn.) is probably identical. 
Among three species of laniellibranclis two are allied very closely to 
types from the Seis beds, Pseudomonotis (Claraia) Grieshachi Bittn. to 
Claraia ovata Schaur., and a species of Avicula to the common A. Vene- 
tiana v. Hauer. Brachiopoda of Palaeozoic habit have not been met 
with either in the Otoceras beds or in the Seis beds. Their only 
representative in the Otoceras beds, Norella procreatrix Bittn., belongs 
to a group or subgenus which is at present known only from Triassic 
rocks. 
On the other hand the recent discoveries of Kossmat and Schellwien 
in Carniola clearly prove the Productus Limestone of the Salt Range to 
be the Indian representative of the Bellerophonkalk. The faunula 
from the hills to the west of Laibach exhibits striking affinities with 
the Permian faunae of the Punjab. From this locality the following 
species have been quoted by Schellwien ^ : — 
Richthofenia aff. Lawrenciana de Kon. 
Productus indicus Waag. 
„ Ahichi Waag. 
Marginifera ovalis Waag. 
Lonsdaleia indica Waag. et Wentz. 
The discovery of this fauna excludes any possibility of correlating 
the Bellerophonkalk with the Ceratite formation or with the Oto- 
ceras beds. The homotaxis of the Bellerophonkalk with the Ceratite 
formation has been advocated recently by G. Caneva.^ This author 
admits the existence of faunistic affinities between the Bellerophonkalk 
and the Productus Limestone, but considers them to be too small to 
justify a homotaxis of the two groups. He prefers to correlate the 
Bellerophonkalk with the Ceratite formation, to which no faunistic 
affinities whatever exist. This is one of the most instructive illustra- 
tions of a method of correlation founded on wrong principles. 
The only ammonite hitherto known from the Bellerophon lime- 
stone, Paralecanites sextensis Dien.'^ belongs to a genus which has also 
1 E. Schellwien : Mmatsber, d. Deutschen Geol. Ges., 1905, p. 35 f. 
2 G. Caneva : Ueber die Bellerophonkalk fauna. Zur Frage der Perm-Tiiasgrenze 
Neues Jahrb. f. Mineral, etc., 1906, II, pp. 52-60. 
^ C. Diener : Ueber ein Vorkommen von Ammoniten und Orthoceren im sued- 
tirolischen Bellerophonkalk, Sitzgsber. kais. Akad. d. Wissensch., CVI, 1897, Math 
Nat. Kl. p. 66. 
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