526 Mr, 11. B. Preston on Mollusca from 



colours gently curved, nearly parallel with termen ; veins 

 partly blackened, especially towards base. Underside of 

 fore wing with white blotch as above, in addition with a 

 white streak between C and SC from base to about one- 

 third and a small elongate Avhite subapical blotch; of hind 

 wing with the dark border reduced to a narrow median bar 

 and diffuse streaks from this to the termen on E,^, R^, M^, 

 M^ and from SM^ to inner margin, the interspaces remaining 

 white ; the dark lines on SM^ and at base of C and of M 

 thicker than above. 



Huancabaraba, Cerro del Pasco, E. Peru ; one ^ . 



Shape and general aspect agree with such species as 

 charisea, Druce, &c. ; but SC^"^ are stalked instead of anas- 

 tomosing, their stalk connected by an extremely short bar 

 with C, and in the hind wing the discocellulars are strongly 

 oblique and SC^ is very short stalked with E.^ In the 

 group mentioned, so far as I have tested it, the ^ antenna 

 is very much more strongly bipectinate, SC^ anastomoses 

 (often quite strongly) with C, and SC^ arises separately — 

 either from cell or from base of stalk of SC"^"^ — anastomo- 

 sing with SC^ ; but variation in some of these details will 

 almost certainly be found. 



LX. — Additions to the non-Marine Molluscan Fauna of 

 British and German East Africa and Lake Albert Edward, 

 By H.B. Pkeston, F.Z.S. 



[Plates Vn.-IX.] 



Gihbulina expatriata, sp. n. (Fig. 1.) 



Shell small, cylindrical, with very blunt apex, scarcely 

 rimate, whitish ; whorls 7, flat, sculptured with fine, closely 

 set, transverse, arcuate striae ; sutures very lightly impressed, 

 slightly crenellate below by the terminations of the trans- 

 verse strise; columella rather broadly expanded, descending 

 nearly vertically, and extending into a broad, thick, white, 

 well-defined callus, which joins the lip above; labrum white, 

 thickened, reflexed, somewhat sinuous above; aperture rect- 

 angular; interior of shell glossy, showing the transverse 

 sculpture through the shell. 



Alt. 9, diam. maj. 3 ram. 



Aperture: alt. 2, diam. 1*5 mm. 



Hah. Shimbi Ilills^ British East Africa. 



