FULTON : NEW HELICOIDS FROM THE XULLA IS. 



149 



stripes, which are interrupted at the middle of last whorl by a 

 yellowish-cream spiral band about 3 mm. wide, which is continued 

 in a narrower band on upper whorls ; whorls 5^, convex, slightly 

 depressed at the suture ; aperture subovate, white, the outer 

 markings showing faintly through ; peristome slightly thickened, 

 inner edge margined with brown colour. Diam. maj. 44, alt. 29 mm. 



fi^a&ito^.— Manguli, Xulla Ids. (W. F. C. Frost.) 



Type in British Museum. 



Similar in form to the more globose forms of Xesta citrina, 

 but sharply distinguished from that group by its oblique colour 

 markings. 



From the same locality Mr. Frost collected a large number of 

 beautiful varieties of what I term Xesta citrina : they are probably 

 identical with those Mr. Schepmann refers to Xesta Tialmaherica, 

 Kobelt, which in the opinion of some conchologists is but a variety 

 of X. citrina, a view shared by the writer ; in any case our specimens 

 do not quite correspond to Kobelt's description. 



The following species were also collected by Mr. Frost at Manguli 

 Id. Those marked with an * are in Mr. Schepmann's paper as 

 having been found also on Taliabu Id. 



* Hemiplecta xullaiensis, Schepmann (scarcely distinguishable from 



H. fruhstorferi, Marts., from Lombok Id.). 



* Trochomorpha nouhuysi, Schepmann. 



* Obha marginata, Miiller.- 

 Chloritis gruneti, Pf . 



„ unguiculina, Marts., var. 



VOL. XIV.— JUNE, 1921. 



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