60 JAMES Francis ABBOTT, 
Fig. A. Vertical section through otolith cup and adjacent structures 
(semidiagrammatic). Plane of section bisects the angle formed by the tentacular 
and sagittal planes of body. 
Ep Epithelium of dorsal surface composed of gland cells and supporting syncytium. 
Uc Upper zone of ciliated cells whose cilia fuse to form a covering membrane. 
G Nerveganglion. Ug Upper layer of a gland cells. Lg Lower layer of same. 
C Zone of ciliated cells supporting otolith. Jn Infundibulum. Jne Flagellate 
epithelium lining infundibular canal. 
Fig. B. Horizontal section (semidiagrammatic) through otolith and capsule 
showing the otolith sustained by the brushes of cilia arising from the ciliated 
zone (see text). 
Ng Nerve ganglion. 7 Tentacular plane. 
