STOW SOtrXH-AFRlCAN GEOLOGY. 529 



least 25 feet high. But whatever may have occaaioned this deposit, 

 the other beds (4, 4, 4) have had a similar origin. 



It was in the lowest bed of shale (3, 3, 3), especially at Sa, where 

 it is 25 feet thick, and of a reddish colour*, that the greatest quantity 

 of reptilian remains were found. Some of them appear to belong to 

 undescribed animals ; others, from a cursory view, seem as if allied 

 to Micropholis'f. jS"os. 26 and 27 are remarkably beautiful and 

 perfect, shovsdng rows of exceedingly minute teeth. No. 24 seems 

 almost identical with another little skull that was obtained from 

 the rocks near Whittlesea, most probably a continuation of the same 

 strata. The portions of the reptilian skeleton (D. S. 10 to D. S. 16) 

 are also exceedingly interesting, on accoixnt of the perfect preserva- 

 tion of the bones of one of the legs. When first got out of the rock, 

 a few of the bones of the foot were attached ; but these were unfor- 

 tunately lost in removing them : even those that are left seem to 

 characterize an animal of more terrestrial habits than many of those 

 already known. 



It is to the energetic zeal of Mr. Donald White that I am indebted 

 for the valuable specimens marked r^pectively D. S. 10 to 40 and 

 43-47, and also for much valuable information with regard to this 

 locality J. At the spot marked 3 a he obtained nine skulls in the 

 course of one day's search. 



The denudation of the lower part of this range of hills is very diffe- 

 rent from that of the higher part occupied by the shale " 10." The 

 sandstones, interbedded wdth the shales, are cut into along the range 

 by niimerous kloofs orravines — ^the strata forming projecting shoulders 

 between them (as shown in the map, fig. 10), and rising in steps from 

 the more level ground to the slopes of stratum 10, thus forming 

 a marked contrast to the latter. 



Below the fossiliferous shale (3), and just below where it is the 

 thickest, the sandstone, a few feet in depth, has a purplish-grey tint 

 (No. 2, 2), as if a portion of the colouring-matter of the shale above 

 had permeated the sandstone to that depth ; below and continuously 

 with this the sandstone is fine-grained and yellowish, and is the 

 lowest exposed rock of the series. 



The outlier h is somewhat different in character from the range 

 of hills. In it the shales are wanting, except at the point 7 ; and 

 they are replaced in a great measure by the sandstone (4, 4, 4) before 

 described, and which we may imagine to be the deposit of a current 

 deflected from time to time from one part of the area to the other. 



On the opposite side of h, and also round the shoulder of the 

 mountain at D, the shales are much more largely develoj)ed than on 

 this side ; but no section has yet been made of them. 



Further, three dykes (12) traverse the outlier, converging towards a 



* Very fine-grained, purplish-red, nodular, argillaceous sandstone, calcareous 

 near the bones. — T. E. J. 



f Quart. Journ. Geol. Soc. vol. xv. p. 642. 



I The specimen marked D. S. 41 (large skull, in two fragments of rock) 

 was given to me by Mr. Powell. The specimen D. S. 42 was found by myself 

 at the Queenstone Quarries ; it is of hard grey sandstone, with a large plume- 

 like plant on it. 



VOL. XXVII. PAET I. 2 



