15. 
. Elements of the armature,* 
. Lateral plate, from the side 
EXPLORATION oF ALASKA. 26 
(=) 
Lamellidoris bilamellata (.) var. Pacifica. 
. Part of the branchial area with (aa) some branchial leaves; bb, 
some of the larger surrounding tubercles. In the centre 
the anal nipple, the renal pore and interbranchial tubercles. 
. The sucking crop, from the edge. 
. The half of the same, from the inside; a, stalk. 
. a, spermatotheca ; b, spermatocysta; c, duct of the last; d, 
duct to the mucous gland; e, vagina. 
. a, two median pseudo-plates; 6, a lateral plate; cc, three 
external plates,* 77°. 
External plate from the side,* 752, 
. Two of the foremost lateral plates with blunted end,* 752, 
Lamellidoris muricata (Muller). 
. a, Median pseudo-plate shining through the left of the lateral 
plates, bb; c, three external plates,* 75°. 
. aa, Basal edge of three lateral plates ; 6, external plates,* 75°. 
. a, Glans penis; bb, praputium ; c, spermatoduct,* 199. 
Lamellidoris varians, Bergh. 
. Lateral plate from the side,* 73°. 
. Median pseudo-plate, from above,* 232. 
Adalaria Pacifica, Bergh. 
innermost part of two rows of external plates,* 75°; a, two 
innermost; 6, the third failing (in the anterior row); e, 
eighth. 
Puate IV (XII). 
Acanthodoris pilosa (O. F. Muller), var. purpurea. 
. Labial disk, with (a) the lancet-formed blades projecting in 
the lowest part of the mouth proper. 
. The lancet-formed blades (a) with the adjoining part (0) of 
the armature of the mouth,* 12°. 
. a, The right lancet-formed blade ; b, the adjoining part of the 
armature,* 359, 
5 
ah 
Zz 
* 350 
b] i eS 
