KÜNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 41. N:0 4. 



29 



tips whitish. Radula with 29 plates; teeth with 5 denticles on each side. 

 L. 10 mm. C. concinna (Alder & Hancock 1843). 



PI. ui tig. 22. 



B. Oral tentacles = the rhinophores ; papillae linear in 9 — 10 rows, the 4 first 

 more close-set than the rest; the anterior angles of the foot a little produced. 

 Colour white, tinged with green, papillae green with white spots and tips. 

 Radula with 36 plates, the tooth-margin with 5 — 6 denticles on each side. 

 L. 10 mm. C. viridis (Forres 1840). 



l'l. Ill tig. 20. 



C. Oral tentacles > the rhinophores ; anterior angles of the foot produced ; pa- 

 pillae in 10—12 rows of 4 — 5 each, cylindrical. Body orange, gills of the 

 same colour or brownish and covered with opaque white dots. Radula ? 

 L. 9 mm. C. angulata (Alder & Hancock 1844 l ) 



= Aeolis obtusalis Alder & Hancock of Loven 1846. 



l'l. Ill tig. 19. 



II. The rows containing up to 8 — 11 papillae. 



A. Rows 13, the midmost with the longest papilla 1 , 8 — 10 in number. Colour (in alcohol) dirty yellowish, 

 papilla' with a whitish tinge. Radula of many plates, teeth with (i — 7 denticles on each side. Ii. 9 mm. 



C. Olrikii (Mörch 1857). 



I!. Rows 11, the foremost with 9 — 11, the hindermost with fewer papillae; foot rather broad. Colour (in 

 alcohol) reddish or pale yellow. Radula with 23 — 31 plates, the teeth with 9 — 11 denticles on each 

 side. L. 5 — 8 mm. ('. hirsuta Bergh 1860. 



Cuthonella Bergh 1884. 



J. Papilla' conical, firmly attached to the body, in 4 groups on each side; each group consisting of numerous 

 transverse rows with 2 — 4, sometimes 5 — (j papilla 1 . The wrinkled oral tentacles < the rhinophores. ^Co- 

 lour dirty yellow: papillae light brownish gray, yellowish at the tip^> (in alcohol). Teeth of the radula with 

 10 — 12 denticles on each side. L. 25 mm. C. abyssicola Bergh 1884. 



II. Papilla 1 subcylindrical in 30 — 37 rows with 3 — 4 in each: oral tentacles < the rhinophores. Colour (in 

 alcohol) reddish brown, papillae compact, dark, rusty brown with lighter tips: the under surface of the foot 

 white with a light tinge of red. Teeth of the radula with 8 — 10 denticles on each side. L. 20 mm. 



C. ferruginea Friele 1902. 



III. Papilla' conical in about 20 close rows with 3 — 5 each; oral tentacles only a little < the rhinophores. 

 Colour (in alcohol) dirty white, papillae dark-blue or blackish, yellow at the top. Teeth of the radula with 

 7 — 9 denticles on each side. L. 16 mm. C. Berghi Friele 1902. 



Hervia Bergh 1874. 



Rhinophores a little > the oral tentacles: head rather broad: papilla 1 in clusters, the first with (i rows, 

 the 2nd with 5. the 3rd with 3; in each row at most 8 — 10 papilla 1 . Colour (in alcohol) dirty yellowish. 

 Radula with 21 'plates, teeth with a strong central spine and 6 — 7 smaller denticles on each side. L. 10 mm. 



H. niodesta Bergh 1874. 



Cumaiiotus n. gen. 



Rhinophores filiform, united at the base ; oral tentacles very small, connected 

 by a low cutaneous fold across the broad head; papilla in about 12 or 13 rows on 

 each side, the first inserted in front of the rhinophores, the largest containing 8 — 9 

 papillae; anus latero-dorsal before the 7th row. Colour (in alcohol) whitish. L. 10 

 — 13 mm, C. laticeps n. sp. 



Text-tigs. 2 4. 



