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THE CONCHOLOGICAL MAGAZINE 



Fig. I. Strobilopi hirasei. 



the inner ends. They are minutely and regularly serrate or nodose 

 at the edge, each node being roughened with many very small, short 

 points directed towards the aperture, and visible only under a com- 

 pound microscope. About one-fourth of a whorl within there is a 

 short nodule or plica on the columella and two on the basal wall, 

 the outer one larger, and visible within the mouth. The others can 

 be seen only by breaking the shell. 



Alt. 2, diam. 3 mm. 



Cheju (Quelpart Island), Korea. Cotypes no. 95,251, A.N.S.P., 

 and 1,538 of Hirase's collection. 



This species differs from all the conic North American forms 

 by its smooth surface. It differs from the Chinese S. diodontina by- 

 being larger, with the inner parietal lamella much smaller, and less 

 conspicuously emerging. The external sculpture also is different, 

 according to Heude's description. The interior of S. diodontina has 

 not been described. 



S. hirasei is sometimes pure white, like the American i' virgo. 



The genus Hypselostoma occurs in Indo-China and regions 

 southward. It has not hitherto been reported from China proper, or 



