R. F. Tomes — Inferior Oolite Madreporaria. 393 



and pali are distinctly denticulated is obvious, and that, with the 

 union of the columella with one of the pali, should that prove 

 constant, indicates a distinct genus. 



Of the walls or endotheca I possess no information, the whole of 

 the inside being crystalline. 



Stephanoccenia expansa, sp. nov. (Plate X. Fig. 11.) 



The corallum consists of a thin and somewhat rounded plate, the 

 edges of which are very thin, turned up, and a little undulating, and 

 there is on a part of it a second or superimposed plate which partly 

 covers the original one. The under surface has the middle part 

 most prominent, by which it appears to have been broadly attached. 

 There is an epitheca with faint concentric wrinkles. The whole of 

 the upper surface is furnished with calices which are much smaller 

 and shallower than those of StepTianocoenia dendroidea. As in that 

 species, they are lozenge-shaped, ovoid, or round, and the depression 

 bounding them is small but distinct, but the septa are continuous 

 with those of adjoining calices. There are from thirty to thirty-seven 

 septa, of which twelve are a little more developed than the others, 

 and have pali before them. Twelve others have the same length, 

 but are a little less stout, and the remainder are about two-thirds of 

 that length, and are much thinner. Both they and the pali are a 

 little exsert, and have their margins denticulated. The fossula is 

 small, but well-defined, and contains a slightly depressed but styli- 

 form columella, which is larger relatively than in the preceding 

 species. 



The endotheca has not been observed. 



Gemmation takes place in the interval between the calices. 



Only one specimen has yet been met with. It was taken from a 

 coralliferous stratum at Cooper's Hill, near Gloucester, which holds 

 preciselv the same stratigraphical position as the one at Crickley 

 Hill. 



Diameter of the corallum, three inches ; its height about three- 

 quarters of an inch ; diameter of the calices, a little less than a line. 



Montlivaltia Painswicki, Duncan. 



Many specimens of this species have now been taken from the 

 Lower Coral bed at Crickley, Birdlip, the Hoi-sepools, and in the 

 Painswick valley, most of which are small in size, the largest not 

 exceeding that of the type-specimen figured by Professor Duncan. 

 As a species it may be distinguished by the tendency to have one or 

 more of its sides flattened. The form of the calice varies a good deal. 

 When one side only is flattened, it has a rudely-formed semicircular 

 outline. It may be more or less triangular or quadrangular, or 

 indeed polygonal, according to the number of flattened sides of the 

 corallum. There is an indication only of flattening of one side in 

 the specimen figured by Professor Duncan, which was for some time 

 in my hands. The calice of that specimen is deeper than is usual, 

 owing 1o the septa having been somewhat worn down. 



In the Oolite marl this species attains to a greater size than it does 

 in the Lower Coral-bed. Two examples from that horizon at Birdlip 



