Vol.51.] MK. E. B. NEWTON ON FOSSILS FROM MADAGASCAR. 91 



Khynchonella (allied to) variabilis, Sehlotheim. 



„ plicatella J. de 0. Sowerby. I ^^ Oolite _ 

 „ conctnna, J . bowerby. | 



„ obsoleta, J. Sowerby. J 



„ (allied to) tetrahedra, J. Sowerby. Lias & Lower Oolite. 



Echinodermata. 



Pentacrinus, sp. Lias (?). 



Acrosalcnia, sp. Lias. 



Stomechinus (allied to) bigranularis, Lamarck. Lower Oolite. 



Actinozoa. 



Montlivaltia trochoides, M.-Edvv. & Haime. Lower Oolite. 

 Epismilia Grandiclierij Fromentel. J 

 Isastrma Eischeri, Fromentel. j- Lias (?). 



Thamnastrcea. J 



Foraminifera. 



Tevtvlaria, sp. "j 

 Cristellaria, sp, 



Lituola? ! -r . ,** 



Marginulina, sp. [ *• '" 



Niimmulites, sp. | 



Planorbidina, sp. ^ 



Plantse. 



Girvanella, sp. Calcareous Algce (?). I T • * i'?'\ 

 Equisetum, sp. Equisetaceae. J ^ '" 



EXPLANATION OP PLATES II. & III. 

 Jurassic fossils from N.W. Madagascar. 



Plate II. 



Fig3. 1, 2, 3. Trocliaciceonina Eichardsoni, sp. nov. 

 ,, 4, 5. Perna orientalis (?). 

 ,, 6, 7. Perna latoconvexa, sp. nov. 

 „ 8, 9. Gervillia iraonensis, sp. nor. 



Plate III. 



Fig. 1. Pteroperna costatula, young form. 



„ 2, 2 a. ima iraonensis, sp. nov. 



„ 3. Mytilus madagascariensis, sp. nov. 



,, 4. Modiola angustissima, sp. nov. 



,, 5. Trigonia costata. 

 Figs. 6, 7. Trigonia jndlus. 

 Fig. 8. Astarte (allied to) depressa. 

 Figs. 9, 10. Pseudotrapezium ventricosum, sp. nov. 



,, 11, 12. Pseudotrapezium depressum, sp. nov. 



,, 13, 14. Pseudotrapezium elongatum, sp. nov. 



„ 15, 16. Gorbula Grandidieri, sp. nov. 



„ 17, 18. Corbula pectinata. 



All the figures are drawn natural size, with the exception of 1, 6, and 8 of 

 Plate 111., which are enlarged 1^ times; fig. 2 a of the same Plate is a magui- 

 fied portion of fig. 2, showing the punctee between the ribs. 



