18 NILS ODHNER, NORTHERN AND ARCTIC INVERTEBRATES. III. OPISTHOBRANCHIA ETC. 



B. Similar to T. Hombergi, but ponis genitalis farther backwards and somewhat 

 below the back. Coloiir påle reddish brown. L. 48 mm. 



T. psoloides Aurivillius 1887. 

 II. Vehim with fingered processes (subg. Candiella Gray 1857). 



A. Veluiu inciseil in tlie middle, with 12 profcsses: liack siiiiiotli, witli 6 — 7 appeudages on each .side: the 

 iiiuer laterals nf tlie radula denticulated, folour (in alcoliolj blui.sli gray: rliinopliores yellow: foot, 

 genital oritice and ninutli yellowisli. L. 50 mm. T. ingoliiana Bergh 1899. 



B. Velnm not incised, with 6 — 8 fingered processes: back slightly warty, with 

 5 — 6 appendages on each side ; teeth of the radula smooth. Colour yellowish 

 brown, sides lighter, marbled with brown ; foot white. L. 17 mm. 



T. plebeia Johnston 1838. 

 Pl. m fig. 5. 



C. Velum not inci.sed, with 4 fihiments; l)afk sliglitly warty, witli ö appendages on each side. Colour 

 white, the liack with a longitudinal opaqiie white line on eacli side. L. 15 mm. 



T. lineata Alpek & Haxcock 1848. 



Fam. Atthilidae. 



Attliila Bergh 1899. 



Velum smooth at the margin; rhinophore.s retractile, the vagina bilohed ahovc. the elub lamelliform; 

 anns and jioriis renalis lateral. liulbns pharyngeus important. Penis inermis. Colour (in aleohol) påle reddish. 

 L;. 32 mm. A. ingolfiana Beegh 1899. 



Fam. Goniaeolididse. n- fam. 



(xoniieolis M. Sars 1861. 



Rhinophores > the oral tentacles ; foot broad, roiinded in front. 



I. Body wliitout cutaneons lolies; rhinciphorcs smooth; laterals of the radula smooth. Colour yellowish with 

 a rosy median band at the sole. L. 12 mm. (G. 0. Sars 1872) G. typica M. Saes 1861. 



II. Body with a cntaneous lobe in the anterior right angle of the back, and with a 



larger one behind the middle; rhinophores granulate; laterals of the radula finely 



denticulated. Colour 3^elIowish white (in aleohol). L. 16 mm. G. lobata n. sp. 



Pl. I tigs. 10— 1,S; text-fig. 1. 



Fam. Dendronotidae. 



I. Vagina' of the rhinophores with simple digitiform proeesses: anterior li(mil-margin with slightly ramose or 

 simple papilhe; papillffi dorsales a little ramified Campaspe Bergh. 



II. Vaginse of the rhinophores and the head with ramose processes; papillae dorsales 



highly branched Dendronotus Ålder & Hancock. 



Campaspe Bergh 1863. 



I. Dorsal papillse 4 on each side; radula (4 — 5). 1.(4—5), lam. lat. with 3 — 5 denticles. lam. med. with 10 

 ones on each side. Colour whifisli. the intestines tran.slucent. L. 3,8 mm. C. pusilla Bergh 1863. 



II. Dorsal paiulhe 6 on each side; radula 9.1.9, lam. lat. with 5 — 17 denticles, lam. med. with 12 — 30 ones 

 on each side. Colour white with reddish brown s])Ots, or dirty brow^n, white-spotted on the sides. L. 12 — 25 mm. 



C. major Bergh 1886. 



