KUNC4L. SV. VET. AKADEMIENS HANDLINGAR. BAND 41. N:0 4. 



19 



Ueiirtroiiotus Alder & Hancock 1845. 

 I. Veliim with 4 — 6 ramose processes; papillce dorsales strongly branchecl; foot ta- 

 pering behind. Colour white, marbled with red and brown. Laterals 9 — 11 with 

 serrated margin. L. about 50 mm. 



D. f rondosus (Ascanius 1774) = arborescens (Mijller 1776). 



Fl. III fig. lö; ef. ri. Il lig. 11. 

 Lam. med. and the outer laterals indistinctly serrated or smooth 



var. Dalh Bergh 1879. 

 II. Velum widely expanded with numerons small lobes and two larger ones on each 

 side slightl}^ branched. Colour påle reddish with white spöts. Laterals 15 on each 

 side, smooth or with indistinct denticles. L. up to 90 mm. 



D. robustus Verrill 1870 = velifer G. O. Särs 1878. 



Fam. Doridoxidse. 



Doridoxa Bergh 1899. 



Ivuduhi X . 1 . CO . 

 Coloui' (ill ak'(jliiil) y('ll(l^\i;^ll wliitc, tlic back liglitiT. L. 12 iiiiii. 



1). ingolfiaiia Bekch 1S<)(). 



Fam. Dorididse. 



1. Body uoarly seniiglobo.sc: iiuiiitle-fold very ;^iiiall: papilki' coiiical: gill.s iu 6 — 10 fascicles; lips and peuis 

 unariiiod: tciitaeles lai'ge. a littlr Hattened: radula x . 1 . x (.subfara. ISatliydoridina') Liatliydoiis Beiuui. 



II. Body more or less depressed, oval; mantle-margin moderately or very broad; 



radula generally without lam. med. 



A. Lips unarmed; radula without lam. med., oo.O.cc. 



1. Tentacles small, tubercle-shaped ; the back coarsely granulate or tubercu- 

 late; foot without median furrow in front (subfam. Archidoridinae). Tentac- 

 les mostl}^ with apical furrow; gills tripinnate, 8 — 14; penis unai-med; late- 

 rals of the radula hamate, smooth Archidoris Bergh. 



2. Tentacles digitiform, tuberculiform or conical; the back minutely granu- 

 late or villose ; foot incised in front. 



a. Branchial orifice Avith the margin smooth ; the back with numerous 

 close-set, small, almost linear papillae ; tentacles conical (subfam. Kentro- 

 doridinse). Gills tripinnate. 12 — 15, narrow; penis armed with a sti- 

 letto; laterals of the radula hamate, smooth Jorunna Bergh. 



&. Branchial orifice with the margin lobated or crenelated. 



+ . The back villose by conical papilbe: teutaelcs tuberculifonn (subfam. Diaululiuw). Gills 

 bipinnate, 0: penis unaiiued: laterals 'erected. staff-like, serrated in the outer margin 



Aldisa Beegh. 



+ + . The back minutely granulate ; mantle very large ; tentacles digiti- 

 form (subfam. Platycloridinse). Gills tripinnate; penis armed with 

 small hooks ; laterals hamate, smooth or denticulated 



Platydoris Bergh. 



