NOTES OX SOME BRITISH NUDIBRANCHS. 345 



specimens are very small indeed and hardly visible. There is a distinct 

 labial armature formed of rods, and the radula consists of two 

 kinds of teeth. In the largest specimen the fornmla seemed to be 

 25 X 6 + 30.0.30 + 6, the six outermost teeth being long, very thin, and 

 compressed together so as to look almost like a single tooth. I have 

 also examined a specimen from Alder and Hancock's collection at 

 Newcastle labelled " Doris planata. W. R. Hughes. Sidmoutli." Tt is 

 only 5 mm. long and 4 broad, and entirely dried up, having unfortu- 

 nately not been kept in alcohol. As far as anything can be made out 

 under such unfavourable conditions, the external characters are much 

 as in Alder and Hancock's plate. The colour is yellowish, the back 

 granulated and pitted, the mantle edge very ample, the branchial 

 pocket large and round. There is a distinct yellow labial armature 

 composed of rods. As usual in these old specimens, the radula is 

 decomposed and in confusion ; but there are clearly visible (a) ordinary 

 hamate teeth ; (b) bundles of long, thin, almost shadowy, teeth. The 

 whole animal is very Hat. 



Through the kindness of Mr. Crossland I have received from the Cape 

 Verde Islands several specimens which are possil)ly well-grown adults 

 of this form, and in any case are closely allied to it. The general 

 characters, particularly the tentacles, branchiie, labial armature, and 

 radula (with a formula amounting to at least 10 + 35.0.35+10) are 

 similar. The differences are: (I) the size (50 mm.); (2) the colour, 

 which was in life brilliant vermilion (though some individuals 

 were pale yellow), with numerous black specks apparently visible 

 only under a lens, whereas Alder and Hancock say that D. i)l((i^(fta 

 was reddish brown, with dark brown spots ; and (3) the texture of the 

 dorsal surface, which seems to be covered by a reticulate pattern, with 

 pits between the ridges and flat tubercles at their junctions. But age 

 and a warm climate may account for these diflerences. However, I 

 have thought it safer to describe the Cape Verde specimens under a 

 separate name as Geitodoris reticulata. 



LAMELLIDORIS, A. .K; H. 



A considerable number of species are found on the coasts of Great 

 liritain, and seem well characterized externally and by differences in 

 the radula. The Doris heaumonti of Farran {Nudihranchiatc Molluscs of 

 Ball/piahill, app. viii. to part ii. of Report on Fisheries of Ireland for 

 1901, p. 4) is, no doubt, LamclUdoris luteocincta (M. Sars), which must 

 thus be added to the British fauna. 



L. lactea, L. qiictdri'macnlata, L. aiireopuncta, L. miniata, and L. olivacea, 

 described by Verrill from the Bermudas, are all very doubtful furnis, 



