14, 
OTN 
10. 
ll. 
. First lateral plate, from the side,* 3° 
. The same, from above,* 23°. 
- Hook of the second lateral plate,* 23°. 
. Genital papilla and everted penis with its glans; b, prominent 
EXPLORATION OF ALASKA. ie 
. Median part of a series of the teeth; a, (false) median plates 
of the rhachis; 6b, external plate of the same; cc, first 
lateral plate; d, third lateral plate,* 332. 
- Continuation of the former; a, fourth | eee b, outermost 
plate,* 33°. 
Four (inner) uncinal plates; a, the second ; 6, the fifth,* 232. 
. First lateral plate,* 2?2. 
. Seventh and eighth ee ernil plates,* 339. 
. Salivary gland; a, gland; 6, duct,* 5%. 
Triopa clavigera (M.). 
. Tentacle. 
. Part of the armature of the penis.* 77°. 
Polycera pallida, Bergh. 
The glans penis,* 73°. 
Puate VIII (XVI). 
Polycera pallida, Bergh. 
. Central nervous system, from the upper side,* 52; aa, visceral 
pliers 
ganglia; b, ganglia buccalia and gastro-esophagalia. 
. Part of the radula with two rows; aa, interior; bb, exterior 
lateral plates; ec, uncinal plates,* 23°, 
. Exterior lateral plate, from the side,* 450, 
. Under side of the two lateral plates:* aa and 5, as in fig. 2, 
* 350 
i 
gE 
fold of the duct of the mucous gland. 
. Glans of the penis, with the end of (6) the spermatoduct,* 
39°; a, point of the glans. 
Archidoris Montereyensis (Cooper). 
Large lateral plate, from the side,* 33°. 
Outer part of two series of plates with 4 plates; aa, outer- 
most,* 33°. 
