KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 41. NIO 4. 



101 



Idalia pulchella Ålder & Hancock var. fusca n. n. 



Pl. II fig. 19. 



Mantle broad as in the tyj)e, but the appendages 6 on each side, simple and of 

 uniform length ; gills 10; colour dark-brovvnish, lighter on the sides. L. 13 mm. 



Loven describes this form (1846) under the name of I. cirrigera Phil. Both the 

 number of the gills and the breadth of the mantle as well as the form of the radula, 

 which is reproduced by Loven in 1847, show confirmity to I. pulchella. Ålder & 

 Hancock (1855) supposed it to be a variety of I. aspersa. 



Cumanotus ^ laticeps n. sp. 



Text-fiffs 



-4. 



Body of a whitish colour, elongated, rather broad, especially in front. Heasu- 

 rements of the largest specimen : length 13 mm. ; breadth över the back (behind the 

 rhinophores) 4 mm,, breadth of the foot 6 mm., of the head o mm.; height 4 mm.; 

 length of the rhinophores 4,5 mm. 



The three remaining specimens varied in length from 9,5 to 12 mm. 



Fiu-. 



Fiff. 2. 



Fia-. 4, 



P'ig. 2. Cumanotus laticeiss ii. sp. from the back. -f- 



Fig. 3. The same from tlie right; peiiis stretched out; female geiiital aperture furuished with a bursa 

 copuhitrix and a pair of circular aculeated cushious. y. 



Fig. 4. Eadula of the same; the laterals turned imvards and tlicir deutitiou showiug througli from tlio 

 under side. 



^ From %u!J.a = wave and vwtov = back. 



