The third Volume of the Cretaceom fauna of Southern India, embracing 

 the bivalved Molhisca, is now completed. This class affords just as perfect 

 evidence of the amazing richness and extent of the Molluscan fauna of that 

 period, as either of the preceding. No less than two hundred and forty-three 

 species representing eighty-five genera will be found described in the following 

 pages. 



In the present volume, even more fully than in the preceding, the reader 

 will find himself indebted to Dr. Stoliczka for a full, elaborate and careful 

 review of the whole class of Pelecj^joda, in which the analogies of the recent and 

 fossU representatives are ably discussed, as well as for very careful lists of all 

 known cretaceous bivalves. None but those who have themselves attempted 

 such a review can appreciate the amount of labour involved in this under- 

 taking, but every student will gratefully acknowledge the value of such 

 contributions to Science. 



The Brachiopoda will be the next class to be illustrated, and are now 

 in hand. 



THOMAS OLDHAM. 



Geol. Surv. Office : Calcutta, 

 Juhj, i^'^'t. 



