KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 41. N:0 4. Öf 



Deseription of the new forms. 



Diaphana hyalina Turton var. spirata n. n. 



Shell hyaline, distinctly umbilicated and with a few lines of growth as in the 

 type ; whorls 2 Vs, the first elevated, globular ; outer lip a little inflexed above the 

 middle and narrowly rounded at the top ; columella with a distinct sinus. L. 3 mm. 

 Br. 2 mm. 



This form corresponds to D. debilis Gould of Pilsbry 1893, which consists of 

 2^/2 whorls and has the spire mamillarly projecting. D. (Bulla) debilis is however 

 described by Gould (1840) as having the apex obtuse and the whorls 5, and is the 

 same as Turton's D. (Bulla) hyalina (1834). Pilsbry supposes this latter name to be 

 a synonym of Brown's D. (Utriculus) minuta (1844), but that cannot be correct, for 

 D. minuta has the »outer lip extending higher than the apex». 



Diaphana glacialis n. sp. 

 Pl. I fig.s. 1—5. 



Shell hyaline with a light yellowish brown cuticula, distinctly umbilicated and 

 with spiral sculpture consisting of a few slightly elevated lines. Whorls 3, the first 

 mamillar; some of the specimens have the apex twisted in a different plane from 

 that of the following whorls. Outer lip uniformly rounded below, nearly straight in 

 the middle and, upwards, forraing a broad sinus and a deep slit before the junction 

 with the body-whorl. Columellar margin slightly sinuous, continued upwards by a 

 thin callus. L. 4 mm. Br. 3 mm. 



Radula similar to that of D. hyalina; the central teeth lamelliform with erected 

 posterior margin and a little thickened in the anterior and lateral parts. The lateral 

 teeth of opposite sides a little differing in size. 



Ooniceolis lohata n. sp. 



Pl. I figs. 10—13, text-fig. 1. 



Body of a yellowish white colour, 16 mm. in length, rather high (5 mm.), broad- 

 est in front (7 V3 mm.), tapering and strongly declining backwards. The back flattened, 



K. Sv. Vet. Akad. HnncU. Band. 41. N:o 4. 13 



