EXPLORATION OF ALASKA. 271 
Acanthodoris pilosa (M.). 
5. a, spermatotheca; b, spermatocysta; c, duct to the mucous 
gland; dd, duct to the vagina. 
Acanthodoris cxrulescens, Bergh. 
3}. Part of the armature of the mouth,* 73°. 
. External plates, from the side ;* 73° a, innermost. 
Chromodoris Dalli, Bergh. 
. The upper part of a branchial leaf,* 19°. 
. Part of the lip-plate, from above,* 752, 
. Elements of the lip-plate,* 73°. 
. Part of the rhachis, with three (bosses or) false plates,* 25°. 
. a, false plate, obliquely, from the side,* 75°. 
. The 13th plate, from the side,* 75°. 
. The 9th plate, from the side,* 73°. 
Triopa clavigera (O. Fr. Muller). 
5. Tubercles of the back. 
. Vertical section of one of the appendices of the back; a, bag 
at the point. 
. Elements of this last bag. 
. Spicula of the skin.* 
. Lowest part of the mouth, with its cuticula; «a, the. free 
in.* 209 
margin,* 20°, 
. Hindermost part of the bulbus; a, tongue; 0b, sheath of the 
radula. 
Puate VI (XIV). 
Chromodoris Dalli, Bergh. 
. The buccal (a) and gastro-cesophageal (b) ganglia,* 40°. 
. Part of the median portion of the radula; a, false plates, on 
each side the 2-3 innermost (lateral) plates,* 7°. 
. Outer part of two series of plates with 11 plates; a, outer- 
most; 6, eighteenth,* 732. 
. a, spermatotheca; b, spermatocysta; c, duct to the vagina; 
d, duct to the mucous gland,* 45. 
