RtINGL. SV. VET. AKADEMIEN S HANDLING AR. BAND 41. N:0 4. 



Fam. Goniodorididae. 



I. Mantle not covering the posterior part of the foot; back with two longitudinal 

 cristse between the rhinophores and the gills, and foot with a median one, united 

 with the hind mantle-margin ; papilla? conical, sparsely set; tentacles short, lobe- 

 shaped; rhinophores laminated, their aperture smooth; radnla 5.1.0.1.5 



Doridunculus G. 0. Sars. 

 II. Mantle without cristse ; club of the rhinophores laminated. 



A. Without cirri. 



1. Head covered by the mantle; tentacles replaced by a velum. 



a. Rhinophorial apertures with small lobes; papilla? conical, close-set; lips 

 armed with fine hooks; penis likewise armed; radula (3 — 5). 1.0. 1.(3 — 5) 



Acanthodoris Gray. 



b. Rhinophorial apertures smooth; gills simply pinnate. 



+ . Papilla? big, club-like or broadly rounded; lips and penis unarmed; 

 ingluvies stalked ; gills 1 1 minute ; radula with numerous teeth 



Adalaria Bergh; 



+ + . Papilla? warty, globular or small, conical ; lips with a narrow ring 

 of papilla? and two processes in the lower part of the oral aperture, 

 ingluvies shortly stalked ; glans penis bowed, unarmed ; radula 

 (1—2). 1.1. 1.(1—2) or 1.1.0.1.1 Lamellidoris Alder & Hancock. 



2. Head not covered by the mantle; tentacles = short side-lobes of the head; 

 lips with fine hooks; gills simply pinnate; mantle ending behind the gills; 

 ingluvies shortly stalked; penis armed with hooks; radula 1.1.0.1.1 



Goniodoris Forbes. 



B. With cirri. 



1. Cirri in the mantle-margin, which is prominent and continuous all around 

 the back; gills simply pinnate; no oral tentacles; lips armed with spines; 

 penis armed; radula 1.1.0.1.1 Idalia Leuckart. 



2. Cirri 2 in front of each rhinophore; mantle-margin indistinct; gills 3, tri- 

 pinnate, with 5 simple appendages outside ; oral tentacles = side-lobes of 

 the head ; lips with rows of hooks ; penis armed with spines ; radula 

 1.1.1.1.1 Ancula Loven. 



Doridunculus G. 0. Sars 1878. 



I. (Jills 3, very minute, before the anus. Colour white: rhinophores and gills pale yellow. L. 7 nun. 



D. echinulatus G. 0. Saks 1878. 



I ! . Gills 5, minute, before the anus. Colour yellowish brown (in alcohol) L. 13 mm. 



D. pentabranchus n. sp. 



PI. 1 figs. 22—23. 



Acanthodoris Gray 1850. 

 T. Gills 7—9, tripinnate; rhinophorial orifice with a few distinct lobes; radula 



