THE SCAPHOPODA OF THE SIBOGA EXPEDITION 



TREATED TOGETHER WITH THE KNOWN INDO-PACIFIC SCAPHOPODA 



BY 



Dr. MARIA BOISSEVAIN, 



De Bilt ( Utrecht j. 



With six plates and 39 textfigures. 



INTRODUCTION. 



Dealing with the Scaphopods obtained during the cruise of H. M. S. "Siboga" in the 

 East Indian Archipelago, I have thought it practical to inchide at the same time the species 

 already known from that region. In doing this I have expanded the narrow geographical range 

 of the East Indian Archipelago to a wider field of exploration, marked by more natural limits. 

 The following region has therefore been adopted : 



The East Indian Archipelago with New G u i n e a and the P h i 1 i p p i n e s , 

 limited eastward by the East point of New Guinea at about a longitude of 150°, north and 

 southward by the tropics of Cancer and Capricorn. Westvvard, this region continues along the 

 south coast of As ia, including the China Sea, the Gul f of Siam, the Bay of 

 Bengal, the Arabian Sea with the Persian Gulf, the Red Sea, and the Indian 

 Ocean between the tropics up to the East coast of Africa. 



From this region 59 species and 3 varieties of species had already previously been 

 described and 40 species and two varieties are now added by the Siboga Expedition, 36 of 

 which are new to science, and 2 varieties, while 4 species had already been reported from 

 other parts of the globe or were known in fossil state. Here follows a list of all the species 

 entered in this Report; those with an asterisk have not been obtained by the .Siboga. 



SIBOGA-EXPEDIÏIE LIV. I 



5477 



