Page. 



CONTENTS. 



Part I. Published 29th April, 1921. 



I. Materials for a generic Revision of the Freshwater Gas- 

 tropod Molluscs of the Indian Empire, No. 3. — The 

 fre.sh water genera of Hydrobiidae ... ... 1 



II. Materials for generic Revi,sion of the Freshwater Gas- 

 tropod MolliLscs of the Indian Empire, No. 1. — The 

 Indian Ampullariidae ... ... ... 7 



III. Notes on Fishes in the Indian Museum, I. — On a new 



genus of Fish closely resembling Psilorhynchus, Mc- 

 Clelland .. .. ., 13 



IV. Notes on Fishes in the Indian Museum, II. — On a new 



species of NewacJiilvs from the Nilgiri Hills ... 19 



V. Notes on Cryptostome Beetles ... ... 23 



VI. Un Linguatulidc nouveau Parasite d'un Batracien ... 25 



VII. Notes on the occasional absence of the paired fins in 

 freshwater fishes, with some observations on the two 

 Apodal Genera Channa, Gronow and Apua, Blyth 27 



VIII. Report on a collection of Bryozoa from the Bay of 



Bengal and other Eastern Seas ... ... 33 



Part II. Piihlis^hed 22nd Avgust, 1921. 



IX. The Indian .species of the genus Tricvh, Benson ... 67 ' 



X. A new species of Termitaphis (Hemiptera-Heteroptera) j 



from India ... ... ... ... 7l j 



XI. A list of the Dragonflies recorded from the Indian i 



Empire with special reference to the collection of i 



the Indian Museum. Part IV. ... ... 75 



XII. On an Anisozygopterous Larva from the Himalayas 



(Order Odonata) ... ... "... 93 



XIII. Phayrea isabellina, Theobald, re-described . . . 109 



