NO. 5 INTERMEDIATE HOSTS OF ASIATIC BLOOD FLUKE BARTSCH 43 



and rather distantly spaced axial ribs, of which ii occur on the last 

 whorl behind the varix, 14 on the penultimate, 11 on the third and 

 fourth from the last, 12 on the fifth from the last, and 15 on the sixth 

 from the last whorl. The intercostal spaces, as well as the ribs, are 

 marked by strong incremental lines which have a decided wavy aspect. 

 Suture strongly constricted. Periphery well rounded. Base slightly 

 elongate, well rounded, narrowly umbilicated and marked by the con- 

 tinuation of the axial ribs and incremental lines wdiich extend into 

 the umbilicus. There is a strong varix a little distance behind the 

 peristome. Aperture broadly oval ; peristome thickened and reflected 

 and adnate to the preceding turn at the parietal wall. The operculum 



is typically oncomelanid. The radula presents the formula : 



2-1-3:9:5. 



The specimen described and figured, U.S.N.M. no. 420953, as well 

 as the other specimens entered under this catalog numl^er, were col- 

 lected by Dr. H. E. Meleney on the shore of Lake Tung Ting, near 

 the city of Yochow, Hunan Province, China. Ten specimens from 

 this lot yield the following measurements : 



Ribs per whorl 



Greatest lO 15 



Least II 12 



Average 12.6 13.5 



" Figured spccin 



I believe that it will prove of interest to give the number of whorls 

 and the measurements of. the height and diameter of the entire lot 

 of 37 additional specimens, so I am subjoining them here: 



