KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 41. N:0 4. 13 



gin with a strong convexity. Striae broad, straight, at regular distances 

 from each other; colour mostly light yellowish. L. 10 mm.^ 



C. inscnlpta (Totten 1835). 

 Shell ihick, almost opaque var. valida Leche 1878. 



2. Outer lip a little extended above, rounded; snperior end of the shell ra- 



ther broad; columellar margin with or without a very small convexity. 



Striae Unear, luidulatory with irregular interspaces; colour reddish yellow 



or brown. L. 7 mm. C. Reinhardti (Möller 1842). 



B. Shell broadest above the middle; superior end very wide; the striee more 



close-set towards the outer margin, deeply engraved ; columellar margin usu- 



ally bent to the left, whereby tlie simis becomes less concave ; colour whitish. 



L. 9 mm. C. scalpta (Reéve 1855) = propinqua (M. Särs 1858). 



Sliell of uiiifonii breadtli. tlii' leiigth not i|uitc '■', tiiiies tlic l>ix'aiUli. Imtli cmls ilistinctly ti-micated; the 

 (luter lip without slit at the sutuve, extended to the heiglit of the apex, not lieyond it; spiral seulpture very 

 indistinct. Colour milky-white and glossy. liadulaV L. 4 mm. t', discus Watson 188ö. 



Diaphaiia Brown 1883. 

 Amphisphyra Loven 1846. 



I. Apex not perforated, broadly flattened; outer lip a little inflexed above the 

 middle. 



A. Length > breadth; cohmiella vertically deseendent or bent to the left; aper- 

 ture not extremely expanded. 



1. Outer lip not extended beyond the apex; umbilicus narrow; spire depres- 

 sed; whorls 3 — 5, hj^aline, without seulpture. L. to 5 mm. 



D. hyalina (Turtok 1834) - debilis (Gould 1840). 

 Spire wart-like, prominent. L. 3 mm. 



var. spirata n. n. =- debilis (Gould) in Pilsbry 1893. 



2. Outer lip produced beyond the sunken apex; umbilicus rather wide; whorls 

 2 — 3 with very indistinct spiral keels. L. unto 4 mm. Shell hyaline with 

 yellowish cuticula D. glacialis n. sp. 



Pl. 1 figs. 1—5. 



B. Length a little larger than breadth; cohmiella bent to the right and the 

 aperture obliquely expanded below ; spire depressed ; whorls 3—4, the penulti- 

 mate projecting a little; umbilicus narrow. L. 6 mm. Shell hyahne 



D. exspansa (Jeffreys 1864). 

 II. Apex perforated, broadly rounded; outer lip produced above the apex. 

 A. Shell without seulpture; outer lip rounded at the suture. 



1. Umbilicus distinct; outer lip flattened above the middle. L. 4 mm. Shell 

 vitreous D. globosa (Lovén 1846). 



' The diagno.sis made with guidance of the specimens tVoni Kära Sea. deteruiined hy Leche. 



