EXPLORATION OF ALASKA. O11 
16. ZL. (?) diademata (Ag.). Oc. Atlant. 
D. diademata, Ag., Gould, 1. ¢., p. 230, Pl. xxi, fig. 298, 300, 301-304. 
17. L. (2) grisea (Stimps.). Oc. Atlant. Gould, l.c., p. 282, Pl. xx, fig. 
292, 295. 
18. LZ. (?) derelicta (Fischer). Oc. Atlant. 
"D. derelicta, F., Journ. de conchyl., xv, 1867, p. 7. 
19. ZL. (2?) tuberculata (Hutton). Oc. Pacif. (Nova Zeland.). 
Onchidorts tuberculatus, Hutton, ef. Abraham, 1. ¢., p. 226. 
20. LZ. (?) eubalia (Fischer). Oc. Atlant. 
Doris eubalia, F., Journ. de conchyl., xx, 1872, p. 10. 
1. L. bilamellata (L.), var. prcifica. Plate V, fig. 10; Plate XI, fig. 3-9. 
Color albido-flavescens, maculis fuscis plus minusve variegatus. 
’ P g 
Dentes laterales margine levi. 
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. r 
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 6-10.60 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 yellowish) ; 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 rhinopheria 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 0.75 mm. in diameter ; the 
larger tubercles mostly showing a spinous surface (Pl. V, fig. 10)' when 
magnified, 
’ Cf. my “‘Malacolog. Unters.’ (Semper, II, ii) Tab. LXVIII, fig. 15-16. 
