preorad pi. 
gs. a 
gill slit ton 
ext orttice of club - ee ; 
OE a mouth gut slit 2. 
sub-chordad tube (rephridium "VE -cord., 
of Hatscheh) 
eye-spob, xc 
i —— 
clubshaped gland‘ 
rightwall of buccal canvity. 
ciliated groove. 
tS 
Fig. 
eye-spob. 
es ypu, 
Peenioritte orci gs! i a! ie gis 
shaped, gland. ee icoil ate edge of mouth, cageae lel mela 
(FIG.1) sy5- LINC ADE 
of Hatscher 
gs8 iH ge? 
eye-spot_ ‘ 
Praeorad, | put 
glardulariratt : SS 
extern, orifice of Clish- 
shaped gland, 
E.Ray Lankester & A Willey del 
gs? 
intra bucead. orifice ano 
atrium 
thickened. Aypoblast. 
COncLUITEnCe, of right é left metapleus 
pigment cn rerve-Cord. 
of clud- shaped gla na 
i a ‘ precoral , pik, 
ee oe ‘ . “glandular tract. 
oe gist? | “club-shaped gland: 
a relaplear Tiere Te (FIG. 2) — 
F Huth, Lith® Edin® 
