58 NAVANAX. 
N. INERMIS Cooper. PI. 15, figs. 89, 90, 91, 92, 93. 
Back of the body, foot and outside of pleuropodia wine-purple, 
ornamented with rounded or oblong spots of yellow; inner sides of 
pleuropodia flesh colored. Free edges of pleuropodial lobes and 
inner edges of the tail lobes and rhinophores orange colored with 
adjacent band and alternating spots of blue; lower side of tail-lobes 
purple-blue; eye-patches white with black centers. Length 33, 
breadth of body proper ? inch (living animal). 
Shell quite thin and completely flexible, brownish-yellow, without 
trace of calcification. As near as could be ascertained its form is 
as in NV. enigmaticusand Aglaja depicta. Its position is as in Aglaja. 
Penis (pl. 15, f. 89) similar to that of the Aglajas in general char- 
acters. 
San Diego Bay (Cooper); Catalina Island (Cooper, Dall). 
Strategus inermis CooreR, Proce. Cal. Acad., ii, p. 202.—Navar- 
chus inermis Cooper, Proc. Cal. Acad., iii, p. 58—Brren, Bull. 
Mus. Comp. Zool., xxv, p. 214, pl. 10, f. 13; pl. 11, f. 2-5. 
The alcoholic specimen examined by Bergh was light coffee- 
brown above with many yellowish-white lines, streaks and spots, 
the sole black with a slight brown tinge, spotted throughout with 
large, small and minute rounded yellow spots, coalescing on the 
median line to form a band. 
N. aniematicus Bergh. PI. 14, figs. 79, 80; pl. 15, figs. 86, 87, 
88; pl. 6, fig. 39. 
Length 25, alt. 10, breadth 10 mill. Color dirty light yellowish- 
white, strongly and irregularly marbled and dotted with black and 
gray, most so on sole. Outer half of inner side of pleuropodia uni- 
form white the entire length; inner half brown-gray. Outer edge 
with numerous black flecks ; gill yellow. Form perhaps narrower 
than in the true Doridiums. The projecting, slightly concave an- 
terior border of head is produced on each side in a tentacular hook 
below the rhinophores (pl. 15, f. 87). Rhinophores rolled as in 
Pleurobranchus. Posterior shield a little longer than the anterior, 
its front edge but little raised. The hind edge of the shield seems 
to have a narrow free edge projecting above the tails (pl. 6, fig. 39, 
dorsal view of animal); but this may bea result of contraction. 
The tail-wings are somewhat as in Aglaja depicta, united above, sep- 
arated below. 
