104 PROCEEDINGS OF THE MALACOLOGICAL SOCIETV. 



sides of Central and South America, but it is also represented in 

 Chinese seas by the species jt;/rt?i« and Ilanleyana. 



Of the distribution of the Sinodia group little is yet known. 

 D. trigona was supposed to occur in the Ked Sea, but this has not 

 been confirmed, wliile it has recently been obtained from Siam and 

 Malacca. D. tripla and D. deriipta are both reported by Homer as 

 coming from Malacca. The home of D. excisais said to be Tranquebar 

 and the Nicobar Islands, and lastly D. globa was found in the Persian 

 Gulf. Thus it would seem that all the species live on the coasts of 

 Southern Asia. 



To Mr. J. J. MacAndrew and Mr. J. C. Melvill I offer my sincere 

 thanks for their kindness in sending many specimens from their 

 collections for my examination, and I have also to tliank Mr. E. A, 

 Smith for his valuable assistance in the naming of specimens submitted 

 to him, and for looking up the types of certain species in the British 

 Museum. 



