29G THE CANADIAN NATURALIST, [Vol. vi 



ed in 1845, tliero is given (page 15 et seq.) an account of his 

 visit to tliis region in company with Prof. Loven, of Christiania ; 

 which, with figures of the sections, is reproduced in the different 

 editions of Siluria. The hill of Kinnekulle on Lake Wener, is 

 one of the three areas of transition rocks delineated on the map 

 of Hisinger above referred to. Resting upon a flat region of 

 nearly vertical gneissic strata, we have, according to Murchison : 

 1. a fucoidal sandstone; 2. alum-slates; 3. red orthoceratite • 

 limestone ; 4. black graptolitic slates ; the whole series being 

 little over 1000 feet in thickness, and capped by erupted green- 

 stone. Above these higher slates there are found in some parts 

 of Gothland, other limestones with orthoceratites, trilobites and 

 corals, the newer limestone strata (a) of Hisinger ; the whole over- 

 laid by thin sandstone beds. These' higher limestones and sand- 

 stones contain the fiiuna of the Wenlock and Ludlow of Ens:- 

 land ; while the lower limestones and graptolitic slates afford 

 Calymene Blumenbachil, Orthis calUgramma, and many other 

 species common to the Bala group of North "Wales. The alum- 

 slates below these however, contained, according to Hisinger, 

 none of the species then known in British rocks, but in their 

 stead five species of Olenus and two of Battus (Agnostus.') 



In 1854, Angelin published his Palceontologica Scandinacica, 

 part I, Crustacea format lonis transit lonis, [4to. forty-one plates} 

 in which he divided the series of transition rocks above described 

 by Hisinger into eight parts designated by Roman numerals,, 

 counting from the base. Of these I was named Regio Fucoidariimy 

 no organic remains other than fucoids being know therein ; while 

 the remaining seven were named from their characteristic genera 

 of trilobites, which were as follows, in ascending order ; certain 

 letters being also used to designate the parts: II. (A) Olenus; 

 III. (B) Conocoryphe ; IV. (BC) Ceratopyge; V. (C) Asaphus; 

 VI. (D) Trinucleus; VII. (BE) Harpes; VIII. (E) Cryp- 

 tonymus. In the Regio Olenorum (II) was found also the allied 

 genus Faradoxides. With regard to the characteristic genus of 

 Regio III., the name of Conocoryplie was proposed for it by 

 Corda in 1847, as synonymous with Zenker's name of Co/iocfj^Zia- 

 lus {Conocephalites^ already appropriated to a genus of insects. 



Meanwhile, the similar crustaceans which abound in the tran- 

 sition rocks of Bohemia had been studied and described by 

 Hawle, Corda and Beyrich, when Barrande began his admirable 

 investigations of this ancient fauna and of its stratigraphical re- 



