KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 41. N:0 4. 21 



of yeliowish or white opaque spöts on each side near the mantle-margin. L. c. 

 30 mm. C. obvelata (Muller 1776) = repanda (Ålder & Hancock 1842). 



1'1, III tigs. 7—!). 



II. Back smooth; radula 40.1.40. Colour white; rhinophores and gills yellow, liver 

 brown, translucent; mantle -with sulplinreous spöts near the margin. L. 15 mm. 

 (in the coUections) C. glabra (Friele & Hansen 1876) 



= Doris Isevis Muller of Loven 1846. 



Fam. Polyceridae. 



I. Maiitle witli a liigli crista on each .side oi tlie luediau liue and terniinatiug ivitli iive lobes bebiud the 

 gills; hack with ekih-shaped papilke; rhinophores witli hirainated club; oral teutacles indistinct; no nian- 

 dibuliie; radula 20.0.20 Triopella G. 0. Saes. 



II. Mantle without cristse. 



A. Rhinophores with sheaths. 



1. Club of the rhinophores smooth ; sheaths with papillse: mantle-margin in- 

 distinct; papillse cylindrical with obtuse ends; radula 18.0.18; an unpaired 

 jaw present Aegires Loven. 



2. Club of the rhinophores laminated : sheaths low, whitout papillse. 

 a. Mantle-margin distinct; body papiUated. 



+ . Papillee club-like, in the mantle-margin; no mandibula?; oral tentacles 



cylindrical; radula 13.2.0.2.13 Triopa Johnston. 



+ +. Papillae conical, also on the back; mandibulse strong, triangulär; oral 



tentacles = broad triangulär lobes at the sides of the head ; radula 



6.2.1.2.6 Issa Bergh. 



b. Mantle-margin indistinct; body smooth; gills with lateral appendages ; mandibula:' present ; radula 

 without lam. med.; oral tentacles absent Thecacera Fleming. 



B. Rhinophores without sheaths, a little retractile, club laminated ; mandibulae 

 present ; oral tentacles replaced by small lobes ; mantle-margin behind the 

 gills with 



1. many processes; mandibulse without produced superior angles; radula 

 8.2.0.2.8 Palio Gray. 



2. one process at each side; mandibulee with wing-shaped superior processes; 

 radula 4.2.0.2.4 Polycera Cuvier. 



Triopella G. O. Sars 1878. 



Gills 3, minute, jilaced semicircularly before the anus; one row of papillte outside each crista and one 

 papilla behind each rhinoi)liore ; the crista; unitcd in front between the rhinophores. Colour whitish. L. 7 mm. 



T. incisa (M. Saes 1872). 



Aes^lres Lovén 1844. 



Gills 3, tripinnate, each with a long tuberous process by the side; velum with 

 10 papillse; niost of the papillse of the back set in longitudinal rows. Colour red- 



