PETROLOGY. 209 



granitoides de la Loii-e. Bull. See. Geol. France, 2 ser. t. ii. 



pp. 60-68. 

 A lithological description of specimens of granitoid porphyries from 

 the Loire. The author divides them into three series — felspaihic, 

 quartziferouSf and euritic, passing one into the other. G; A. L. 



L6vy, Michel. Note sur une classe de roches emptives intermediaires 



entre les granites porphyroides et les porphyres granitoides. Groupe 



dcs Granulites. [A class of eruptive rocks between the porphy- 



roid granites and the granitoid porphyries. Granulite group.] 



Bull. Soc. Geol. Prance, 3 ser. -t. ii. pp. 177-189. 



Proposes to restrict the name Granulite to rocks of an exclusively 



eruptive origin, fine-grained, essentially composed of abundant lamella3 



of felspar (usually either orthoclase or oligoclase), in the midst of 



which are to be seen numerous grains of quartz and spangles of mica. 



To these Granulites are allied schistose rocks of the kind known in part 



as Leptynite by most authors, which will be called Schistose Granulite, 



and large-grained rocks known as Pegmatites. The ancient stratiform 



rocks allied to gneiss and mica-schist, which have been known under 



the above names, will all be grouped under the name Leptynite. 



G. A. L. 



, and — DoTJViLL^. Note sur les granulites et les porphyres 



quartziferes des environs d'Avallon (Yonne). [Quartzites and 

 quartziferous porphyries of Avallon (Yonne).] Bull. Soc. Geol. 

 France, 3 ser. t. ii. pp. 189-195. 

 A detailed lithological description of the granulites and granitoid 

 rocks between Lormes and Avallon. The various rock-types distin- 

 guished by the author are : — 



Porpbyroid Granite 



Granite with white mica (Granulite) \ Coarse-grained type. 



Granitoid Porphyry of St. Just 



„ ,, of Boen Very fine-grained granidites. 



Granuhtic Elvans | True porphyritic type, merging 



Granitoid Porphyries of Urph6 V into the very quartziferous 



Porphyries with Pinite of Auvergne J type. 



The chronological order of the rocks gives the following series : — 

 1. Porpbyroid granite. 2. Granulite (Devonian). 3. Granitoid por- 

 phyry (Carb. limestone) and Porphyry with Pinite of Auvergne. 



G. A. L. 



LiNDSTBoM, Axel. Om kalkhalten i mergel. [Percentage of limo 



in marl.] Geol. filren. Stockholm Forhandl. bdt. ii. pp. 33-44. 

 The results obtained and the opinions held with regard to this sub- 

 ject by various writers, from Pliny onwards, are quoted. 



LossEN, K. A. Der Bode-Gang im Hartz, eino Granit-Apophyso von 

 vorwiegend porjihyrischer Ausbildung. [The Bode dyke in the 

 ITartz.] Zeitsch. deutsch. geol. Ges. Bd. xxvi. Heflb 4, pp. 856-906. 



Suggests that a hot fluid granitic magma was injected into a fissure 

 extending fi-om the Bamberg granite towards the Brockcn, and that, 



1874. i> 



I 



