178 Reviews — Geology of the Johannesburg Country. 



Wenlock. 



Upper Ludlow. 

 Wenlock. 



List of the British Species of Flexibilia as they result from his 



profound researches : — 



Lecanocrinus bacchus (Salter sub Ichthyocrinus) 



Homalocrinus parabasalis Angel in . . . 



Synn. Taxocrinus nanus Salter MS. 



Homalocrinus dudleyensis Springer. 

 Calpiocrinus intermedius Springer . 

 Hormocrinus anglicus Springer 

 Pycnosaccus bucephalus (Bather sub Oncocrinus) 

 Temnocrinus tuberculatus (Miller sub Cyatho- 



crinites) (usually known as Taxocrinus) 

 Meristocrinus orbignyi (M'Coy sub Taxocrinus) . 

 Meristocrinus minor Springer 

 Sagenocrinus exjpansus (Phillips sub Actino- 



crinites) ...... 



Ichthyocrinus pyriformis (Phillips sub Cyatho- 



crinites) ...... 



Ichthyocrinus intermedius Angelin . 

 Ichthyocrinus phillipsianus Springer 

 Euryocrinus concavus Phillips .... 



Euryocrinus rofei Bather & Gregory in Springer 

 ■? Euryocrinus granulosus Phillips (sub 



Poteriocrinus) .... 



Wachsmuthicrinus ponderosus Springer 

 Synerocrinus incurvus (Trautschold) 

 Amphicrinus scoticus Springer 

 Taxocrinus macrodactylus Phillips . 

 Taxocrinus stidtus Whidborne 

 Taxocrinus nobilis (Phillips sub Peteriocrinus) 

 Onychocrinus wrighti Springer 

 ? Onychocrinus polydactylus (M'Coy sub 



Taxocrinus) ...... „ 



F. A. Bather. 



Lr. Carboniferous. 



Upper Devonian. 



J? 

 Lr. Carboniferous. 



The Geology of the Country surrounding Johannesburg. 

 By E. T. Mellor. Explanation of Sheet 52, Geological Survey 

 of the Union of South Africa, pp. 46, with colour-printed 

 map, 1921. Price, including map, 5s. 

 'T^HE well-printed map on the scale of 2'34:7 miles to the inch 

 -"- covers an area of about 2,100 square miles, with Johannesburg 

 approximately at its centre. A comparison of this map with that on 

 a slightly smaller scale published by Dr. Hatch in 1903, serves chiefly 

 to emphasize the remarkable accuracy of Dr. Hatch's pioneer work. 

 The chief difference to be discerned in the new map is a considerable 

 extension of the Coal Measures in the eastern district between 

 Benoni, Springs, and Heidelberg, and the introduction of some con- 

 siderable patches of Karroo dolerites overlying the Dolomite north- 

 west of Heidelberg. Another new feature of minor importance is a 



