32 Reviews — Development of Monticidiporoids. 



are usually covered by alluvium and river-gravels. So that sections 

 luade during the construction of the Great Central KailVay and in 

 the town, have revealed nothing of importance. From Normanton 

 Hills southward the section is in Red Marl, up to the Soar Valley, 

 just opposite the Loughborough Road. In a cutting a bed of sand- 

 stone 3 feet thick, dipping to the north at l'^-2°, was encountered. 

 At Nottingham Road the marl was 8 feet thick, at the Midland 

 Railway 14 feet, and at the Canal 12 feet. 



Turning to the surrounding ai'ea, it may be noted that the gypsum 

 at Chellaston where alabaster is obtained is 6 to 12 feet thick. The 

 Red Mai'l forms a feature, and in the overlying Drift Foraminifera 

 were obtained, once thought to be Triassic. 



At Chilwell,^ to the north, a thick band of sandstone near the base 

 is brought up on the south side of a fault, and is 20 to 30 feet thick, 

 and resembles the Dane Hill Sandstone. A band of skerry near the 

 base of the marl liere is traceable from Derby to the Erewash Yalley. 

 In the Sandstone salt pseudomorphs are abundant. 



A boring at Clifton Colliery showed 157 feet of Red Mai'l overlying 

 the Coal-measures. At Ruddington there was 386 feet of Red Marl, 

 75 feet Waterstones, 218 feet Bunter, above Coal-measures dipping at 

 a high angle. At Owthorpe there was 12 ft. 6 in. Lias, 34 ft. 6 in. 

 Rhsetics, 633 feet Red Marl, 125 feet Lower Keuper, 428 feet Bunter, 

 overlying Coal-measures. 



At Melton Mowbray the section was — 



Feet. 



Loam and gravel . . . 14 



Boulder-clay .... 24 



Lower Lias .... 230 



Ehaetic 16-4 



Upper Keuper (Tea-green, 24 feet) 248 



532-4 

 This shows that while in Leicestershire the Bunter thins out eastward, 

 northwards there are deep hollows in these beds, and that tbey 

 thicken eastward locally, thinning southward. The Lower Keuper 

 also thickens eastward, but to a less extent. 



{To be continued in our next Number.) 



I^El^VIE^W^S. 



I. — Dhvelopment and Systematic Position of the Monticulipoeoids. 

 By E. R. CuMiNGs. Bulletin of the Geological Society of America, 

 vol. xxiii, pp. 357-70, pis. xix-xxii, 1912. 



rilHE systematic position of the Monticuliporoids has long been 

 J_ uncertain. Considered by Nicholson as ' Tabulate ' Corals, they 

 were generally so regarded. Ulrich, and after him Bassler, American 

 specialists in Palaeozoic Polyzoa, claimed them for their group ; and 



' A boring here passed through Bed Marl and Sandstone 167 feet, Pebble 

 Beds 2.58 feet, Soft Sandstone 33 feet, and 877 feet of Coal-measures. 



