400 Prof. T. G. Bonney— 



(10) Family Claosauridce. Premaxillaries edentulous ; teeth in 

 several rows, but a single row only in use. Cervical vertebrae 

 opisthocoelian. Limb bones solid ; fore limbs small. Sternal bones 

 parial. Postpubis incomplete. Femur longer than tibia ; feet 

 ungulate; three functional digits in man us and pes. (Figure 12.) 



Genus Claosaurus. Cretaceous, North America. 



(11) Family Nanosaurida. Teeth compressed and pointed, and 

 in a single, uniform row. Cervical and dorsal vertebras short and 

 biconcave ; sacral vertebra? three. Ilium with very short pointed 

 front, and narrow posterior end. Limb bones and others very 

 hollow; fore limbs of moderate size; humerus with strong radial 

 crest; femur curved, and shorter than tibia; fibula pointed below; 

 metatarsals very long and slender. Anterior caudals short. 



Genus Nanosaurns. Jurassic, North America. Includes the 

 smallest known Dinosaurs. 



In these restorations of Dinosaurian Reptiles the scientific name, 

 the size, geological formation, and country where found, are given 

 under each of the twelve figures. The skeletons here restored are 

 represented in the same general position, to aid in comparing them 

 with each other. 



III. — On a Pebbly Quartz-Schist from the Yal d'Anniviers 



(Pennine Alps). 



By Prof. T. G. Bonnet, D.Sc, LL.D., P.R.S. 



IN 1893 I described in this Magazine 1 a group of quartz-schists 

 which may be traced for many miles along the Alps — a group 

 belonging to the series which appear to be the newest among 

 the crystalline schists of that chain. I may refer to this paper 

 for a description of their mode of occurrence, distribution, and 

 structure, both macroscopic and microscopic, merely stating that, 

 while considering them to have had a clastic origin — in other words, 

 to be metamorphosed sandstones — I pointed out that they presented 

 some material differences from ordinary quartzites, and that 

 " original fragments [could not] be distinguished with certainty 

 in any of them," though " here and there a clastic structure," of 

 which I gave instances, " may be suspected." 



In 1894 my friend Mr. J. Eccles, F.G.S., informed me, on his 

 return from the Alps, that he had discovered pebbles in this 

 quartz-schist in the Val d'Anniviers (Einfisch-thal), 2 showing me 

 specimens of the rocks. I examined one of these under the micro- 

 scope, and the results fully confirmed his determination in the field. 

 This pebbly schist, he said, occurred on the western flank of the 

 range between the Val d'Anniviers and the Turtman-thal, in an 

 upland glen of the Tounot, about one-third of a mile ESE. of the 



1 Geol. Mag., Dec. Ill, Vol. X, pp. 204-210. 



2 It is the second valley to the west of the Yispthal, opening into the Ehone 

 Valley opposite to Sierre. 



