= 
Fia. 154. 
Aplysia leporina (dorsal aspect), with the parapodia and mantle reflected from the mid-line. 
a, anterior cephalic tentacle ; b, posterior tentacle (between @ and b, the eyes); ¢, right para- 
podia ; d, left parapodia ; e, hinder part of visceral hump ; f.@, anterior part of the foot, under- 
lying the head ; f.p, posterior extremity of the foot; g, ctenidium ; h, the mantle-skirt tightly 
spread over the horny shell and pushed with it towards the left side; i, the spermatic groove ; 
k, the common genital pore; /, orifice of the grape-shaped gland ; m, osphradium ; 7, outline 
of part of the renal sac below the surface ; 0, external aperture of the kidney ; p, anus. 
Lankester. ) 
Fic. 155. 
Dexiobranchaea paucidens, Boas, 
ventral aspect, Jj. 
ciliated ring; f, anterior part of the 
foot; /’, posterior part of the foot; 
Ji, fins or parapodia ; g, gill; pr, pro- 
boscis 5; su, 
(After Boas.) 
suckers 5 
C2, 
t, 
posterior 
tentacle. 
Fic. 156. 
Halopsyche gaudichaudi, ventral aspect, 
the body-wall removed, the head to the right- 
hand side. a, the mouth; c, the fin-like 
lateral lobes of the foot; d, the anterior 
median part of the foot ; e, cephalic tentacles ; 
f, the posterior median part of the foot; 
k, retractor muscles; J, appendages of the 
cephalic tentacles ; 0’, anus; 0, p, liver ; 
u,v, Ww, genitalia; y, genital pore. (From 
Lankester, after Souleyet.) 
172 
(After 
