LITHOTHAMNIA. 471 



Fig. 6. LiihophyUuin Kaiserii Heydr. A coarse specimen of a form most nearly related to f. suh- 

 plicata Fosl. 



Fig. 7. Lithophylhmi Kaiserii Heydr. An almost typically developed specimen of the species. 



Plate XXV. 



Fig. 1. Lithophyllum craspedium f. compressa Fosl. A rather typical specimen of the form. 



■Fig. 2. Lithophyllum craspedium f. abbreviata Fosl. A fully developed specimen, showing the 

 transition to f. subtilis Fosl. 



Fig. 3. Goniolithon Fosliei (Heydi'.) Fosl. A rather young specimen of the species, attached to 

 a coral. 



Fig. 4. Goniolithon frutescens Fosl. f. typica. An apparently freely developed specimen of the plant. 



Fig. 5. Goniolithon frutescens f. congesta Fosl. A roundish or almost subhemispheric specimen with 

 a coral nucleus. 



Fig. 6. Goniolithon frutescens f. congesta Fosl. A young specimen sticking to a coral, giving 

 transition to f. typica. 



Fig. 7. Goniolithon Brassica-florida (Harv.) Fosl. f. laccadivica Fosl. A rather young specimen, 

 surrounding a branch of a coral. 



