62 PROCEEDINGS OF THE ACADEMY OF [1880. 



16. L. (?) diademata (Ag.). 6c. Atlant. 



D. diademata, Ag., Gould, 1. c, p. 230, PI. xxi, fig. 298, 300, 301-304. 



17. L. [?) grisea (Stimps.j. Oc. Atlaut. Gould, 1. c, p. 232, PI. xx, iig. 



292, 295. 



18. L. (f) derelicta (Fischer). Oc. Atlant. 



B. derelicta, F., Jouiu. de conch yl., xv, 1867, p. 7. 



19. L. (?) iuberculata (Hutton). Oc. Pacif. (Nova Zeland.). 



Onchidoris tuberculatus, Hutton, cf. Abraham, 1. c, p. 226. 



20. L. (?) eubalia (Fischer). Oc. Atlant. 



Doris eubalia, F., Journ. de couchyl., xx, 1872, p. 10. 



1. L. bilamellata (L.), var. jooci/ica. Plate V, fig. 10; Plate XT, fig, 3-9. 



Color albido-flavescens, maculis fuscis plus minusve variegatus. 



Dentes laterales margine Itevi. 



Hab. Oc. Pacific, sepentr. (Mar. Beringi). 



Six specimens of this variety of the Atlantic species were taken by 

 Dall, in Bering Sea (Hagmeister Id.), in August, 1874, at low water, 

 on a gravel beach. Three were sacrificed for the anatomical examin- 

 ation. 



According to Dall, the color of the living animal was "yellowish- 

 white with brown macule." 



The length of the specimens preserved in spirits was 11-13.0 mm. 

 by a height of 4.5-5.5 mm. and a breadth of 6-10.0 mm. ; the height 

 of the rhinophoria 1.75-2.2, of the branchial leaves 1-1.2 mm, ; the 

 breadth of the foot at the fore-end about .5-8.0 mm. ; the margin of 

 the mantle projecting freely about 1.5-2.0 mm. The color of the 

 individuals on the back was yellow-white, marmorated with light 

 reddish-brown, this marbling always occupying the spaces between the 

 tubercles, which are nearly white (or light yellowir-h) ; the branchial 

 leaves of the same reddish color ; the club of the rhinophoria yellowish- 

 white ; the under side of the body yellowish-white or whitish. 



The form was elongate-oval. The head flattened, nearly semicircu- 

 lar, with the tentacular edges a little prominent. The vicinity of the 

 posterior margin of the rhinophor-holes plain, at the anterior two 

 large erect tubercles ; the club of the rhinophoria with about twenty 

 leaves, the stem rather short. The back covered all over with semi- 

 globular and short club-shaped rounded tubercles of different sizes, 

 mostly small, mixed with many larger ones 0.'I5 mm. in diameter ; the 

 larger tubercles mostly showing a spinous surface (PI. V, fig. 10)^ when 

 magnified. 



o 



1 Cf. my "Malacolog. Unters." (Semper, II, 11) Tab. LXVIII, fig. 15-16. 



