kUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 41. N:0 4. 25 



2. Gills 10; tubercles small, blunt. Mantle white, somewhat reddish, with 



brown spöts. L. 12 mm. L. inconspicua (Ålder & Hancock 1845''). 



B. lyaterals without liook iiear the apex, strongly curved, almost forming an angle in the middle; papilte 



elongate-conical ; foot narrow, extended beyond tlie mantle behind, witli a dorsal keel. Colom- transparent 



white, spotted with red; a yellow band along each side of the back. I., fi mm. 



L. luteocincta (M. Saks 1870). 



»Corpore ovato-depressiusculo. albo, hepate tanien fusco pellm^ente: ])allio tuberculato, minute cicatricoso; 

 hranehiis (i — 7.» L. 10 mm. L? acutiuseula (Möller 1842).^ 



OoiiicKloris Forbes 1840. 



I. Palllal margin smooth or slightiy undulating, usiially erect, incised in the middle 

 behind. Along the middle and the sides of the back a tubercled fold. Gills 13. 

 Sides of the body smooth. Colour white or yellowish with a rosy tinge; mantle 

 with opaque white or yellow spöts; rhinophores yellow; gills transparent. L. 14 mm. 



G. nodosa (Montagu 1808). 

 Pl. III tig. 15. 



II. Pallial margin furnislied with spöts with regular iuterspaees ; gills ()(>) in an incomplete cirde. Color white, 

 mantle-margin. front of the head and the ti]is of the rhinophores and those of the gills yellowish green. 

 L. 8 mm. (t. Danielsseni Friele & Han.sen 1876. 



Idalia Lextckart 1828. 



I. The middle of the back with 4 — "i cirri: lips with a ring of liooks: inner lam. lat. of the radula smooth 

 (siibg. Idalia). 



Gills 18; mantle-margin with 2 long, tentacle-shaped cii-ri in the front, with short papillae along the 



sides and with small lobes behind. Colour rosy to whitisji. ciiri (iraiige, the rhinophores reddish towards 



tlie ends. L. unto 38 ram. I. elegans Leuckart 1828. 



II. The middle of the back without cirri ; lips with a spiny lamina on each side ; 



inner lam. lat. of the radnia denticulated (siibg. Idalielia Bergh 1881). 



A. Gills 9, the posterior ones shortest; mantle-margin in the front with 4 long, 

 filiform cirri, on the sides with 2 or 3 very short ones, and behind at the 

 sides of the gills with a long bifid process; the upper 'V4 of the rhinophores 

 laminated ; the base of the inner laterals mtich produced diagonally. Colour 

 whitish with light döts. L. 9 mm. I. pulchella Ålder & Hancock 1855. 

 Gills 10; lateral appendages of the mantle 6 on each side, simple, of equal 

 length. Colour dark-brownish, lighter along the sides. L. 13 mm. 



var. fusca n. n. ==- cirrigera Philippi of Loven 1846. 



Pl. II tig. 19. 



B. Gills 10, short, of equal length, the anterior and posterior ones bifid (the 

 branchial rosette consequently with 12 points) ; mantle forming a very narrow 

 area with 2 — 3 1 ateral appendages and a short posterior one ; the rhinophores 

 laminated from top to base ; the inner laterals with rather broad and short 

 base. Colour yellowish with brown and orange spöts. L. c. 13 mm. 



I. aspersa Ålder & Hancock 1845''. 



^ MöECH includes (1877) this species ni Lamellidoris; no låter description l>eing published about it, 

 Möller's diagnosis is given above. 



K. Sv. Vet. Akad. Haiidl. Bniid 41. N:(i i. i 



