DORIS. 87 



underside of the mantle veined : dorsal tentacles clavate, white 

 or yellowish, finely laminated: oral tentacles flattened and 

 broadly angulated : gills 5, small, tripinnate. L. 1. 



HABITAT : Not uncommon among the rocks between tide- 

 marks, on the north-east coasts of England and Scotland ; also 

 found in Shetland and on the west coast of Scotland ; but it 

 does not appear to extend to the south of England. [Falmouth 

 (Cocks).] Roundstone, Connemara ("W. Thompson). It is 

 found on the Swedish and Norwegian coasts, and is considered 

 by Professor Loven to be the D. obvelata of Miiller. It is the 

 D. Icevis of Fleming. [Calvados, France (Fischer).] 



B. Gills simply pinnate, non-retractile : no oral tentacles, their 

 place being supplied l>y a veil : odontopliore narrow, with 

 few spines. (Lamellidoris, A. fy H.) 



9. D. AS'PERA, Alder and Hancock. 



D. aspera, A. & H. in Ann. N. H. 1st ser. ix. p. 32 ; and Brit. Nud. Moll, 

 fam. 1, pi. 9. f. 1-9. 



BODY elliptical, semitransparent, white, sometimes with a 

 tinge of yellow : mantle with stout, flattish, clavate tubercles : 

 dot-sal tentacles subconical, laminated on the upper half : liead- 

 veil rather broad, but not much produced: gills 11, small, 

 erect : liver of a pinkish hue, apparent through the skin. 

 L. 0-3. 



HABITAT : Under stones between tide-marks, on the north- 

 eastern coasts of England and Scotland, not uncommon ; less 

 common on the western coast of Scotland. Malahide, near 

 Dublin (Alder). [W. Sweden (Loven).] 



D. aspera is rather more active than most of its congeners. 

 When kept in a vase it is apt to creep out of the water and 

 die upon the sides of the vessel for want of moisture. This 

 habit is common to several of the littoral Dorides. 



