KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 41. N:0 4: 39 



fSpiriiilis Eydoux & Souleyet 1840. 



1. Whorls 9 — 10, spirally striated, the last = "/s of the length of the shell. Body 

 purplish, shell hyaline of about 5 mm. in length 



S. balea (Möller 1841) = Gouldi Stimpson 1851. 



2. Whorls 6—7, spiral sculpture indistinct; spire less elevated than in the preceding 

 speeies; the last whorl = V3 of the length of the shell. Colour as in the preced- 

 ing species. L. of the shell about 3 mm. 



S. retroversus (Fleming 1823) = Flemingii Forbes 1848. 



Fam. Cavoliniidae. 



1. Shell calcareous, rhomboidal, with lateral keels, broadest at the aperture; lateral 

 slits absent Clio Browne. 



2. shell mostly (■onieous. with a latpral slit (in o':K:h side, tlinmsh wliich the luaiitle is deHeeted över the shell 



Cavoliiiia Abildcuakh 



Clio Browne 1756. 

 Cleodora Péron & Lbsueur 1810. 



Shell triangulär, convex above, slightly concave below; on the ujjper side with 

 5 ridges, on the under side with one. Colour of the shell glassy white; the mantle of 

 the animal has a metallic lustre. L. 15 mm. C. pyramidata Browne 1756. 



Cavoliuia Abildgaard 1791. 

 Diacria Gray 1842. 



Shell suh-trianf?ular with one posterior anil two lateral spines, without stri»:' hut with 5 keels on the 

 upjier surface. Mantio without produced appendages. L. Kl mm. C. trispinosa (Lesueuh 1821). 



Fam. Clionidae. 



Clione Pallas 1780. 



Wings ovate-triangular, nearly as long as the breadth of the body. Colour 

 rosy towards back, in other parts bluish hyahne. Radula 8.1.8 (G. O. Särs 1878) 

 or 12.1.12 (LovÉN 1847). L. about 35 mm. 



C. Hmacina (Phipps 1774) -^ CUo borealis Bruguiére 1792. 



