TAB. XLII. 

 CORALS FROM THE MOUNTAIN LIMESTONE. 

 LlTHOSTROTION PoRTLOCKI (p. 194). 



Fig. 1. A specimen quite massive ; natural size. 



1 a. A massive specimen offering few corallites, free laterally ; natural size. 



1 b. Calice, magnified. 



1 c. Some Corallites separated from a massive specimen ; natural size. 



1 d. One of these Corallites, magnified. 



1 e. A vertical section, magnified. 



If. Some calices having lost the columella, 

 ly. A horizontal section, magnified. 



LlTHOSTROTION M'CoYANUM (p. 195). 



Fig. 2. A gibbose mass ; natural size. 



2 a. Under surface of a weather-worn specimen. 

 2 b. A few calices, magnified. 



