272 SCIENTIFIC RESULTS OF THE 
Chromodoris Californiensis, Bergh. 
5. Hinder part of the body, from the under side, with 6 knots 
on the mantle-margin; a, foot,* 772. 
6. Upper median part of the true rauth.® 750 
7. Part of 4 series of hooks of the lip-plate, from above,* 73°. 
8-10. Elements of the same, in different positions,* 77°. 
11. Three innermost plates; a, the first,* 77°. 
12. One of the largest plates,* 7°. 
13. Hook of 3 larger plates, auliqdely: from the foreside,* 73°. 
14. Four outermost-plates ; a, outermost,* 77°. 
15. Two irregular outermost plates; a, nite aaee 739, 
Acanthodoris czrulescens, Bergh. 
16. Series of plates; a, two lateral plates; b, the outermost of 
the external plates,* 27°. 
Triopha modesta, Bergh. 
17. Part of one of the hindermost series of plates (in the sheath), 
with (a) 4 lateral plates and (6, c) 2 external plates,* 29°. 
18. a, second and b, third large lateral plates, from above ad 
from the back,* 29°. 
19. a, fourth; 8, fifth plate (as in fig. 18 from the tongue),* 222. 
20. Outer false plate of the rhachis (from the sheath),* #72 
Triopa clavigeru (M.). 
21. a, second lateral plate; b, two external plates,* 73°. 
22. First lateral plate,* 3?°. 
PuaTE VII (XV). 
Triopha modesta, Bgh. 
1. Central nervous system,* 4°; a, ganglia cerebro-visceralia ; 
bb, pedal ganglia; c, ganglia olfactoria proximalia ; dd, 
buccal ganglia; e, gangl. gastro-cwsophagal. 
The labial disk with the true mouth. 
Upper commissure of the lip-plates,* 43. 
Elements of the lip-plate,* #2. 
Upper ends of two clemantart 272. 
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