PLATE XXX. 



[Part IV.—Sejitember 1883.] 



Fig. 1, 1 a. OxYTES oxYTES, Bs. Shell, natural size ; largest speeiraen from S.W. Khasi 

 Hills. 



2. 2 a. Ditto : usual size. Same locality. 



3. Ditto : animal. Cachar. From original drawing (No. 36) by native artist in 



Library, Indian Museum, Calcutta. 

 3 a. Ditto : the mucous gland, viewed from above. 

 3 b. Ditto : tentacles. 



4. OxYTESOROBiA,Bs.,fromStoliczka'soriginal drawing (No. 45) made by a native artist. 



