TOMES : MESOZOIC CORALS OF THE COUXTY OF YORK. 
85 
yet met with in any other part of England. Doubtless the 
labours of collectors would be rewarded by the discovery of other 
interesting madreporaria were diligent search made. 
Description of Plate XX. 
Fig. 1. Dimorpliosmilia eboraceiisis, natural size, seen from above. 
The denticulations on the edges of the septa have been 
worn off. 
Fig. 2. Dimoiyhosmilia ehoracensis, the under surface of the 
same species, showing the epitheca, and point of 
former attachment. 
Fig. 3. Dimorphosuiilia ehoracensis, the side view of the same 
• specimen. 
Fig. 4. Dimorphosmilia eboracensis, a septum magnified showing 
the strongly-developed denticulations. 
Fig. 5. Gonioseris Leckeiihyi, a tall specimen, natural size, having 
the apical ft)ssula well defined. 
Fig. 6. Gonioseris Leckeiihyi, a magnified figure of the apical 
fossula showing the sub-cristiform development of the 
upper termination of the primary septa. 
Fig. 7. A plan of the septa in Gonioseris showing the primary 
septa forming the salient angles, and the secondary 
ones in the receding angles. A little magnified. 
