Explanation of the Plate il). 

 Some of the Noma Fossils. 



Fig. 1- Heliastnea sp. ^/^ nat. size. 



Fig. 2- Do. A fragment in natural size. 



Fig. 3. Madrepora sp. A fragment. 



Fig. 4- Perna marsupium Lam. (Tropical species). 



Fig. 5- Cyprsea carneola Linné. (Tropical species). 



Fig. 6. Cytherea tigrina Lam. (Tropical species). 



Fig. 7. Triton obscurus Rve. (Tropical species). 



Fig. 8- Area fusca Brug. (Tropical species). 



Fig. 9. Triton costatus Born. (Tropical and Japanese species). 



i 



