MORPHOLOGICAL STUDIES. 
22 7 
Fig. 92. — Trigeminus ganglion and sense organ from Fig. 91, highly 
magnified. Z. F, oc. 2. 
Fig. 93. — Mesocephalic ganglion and its sense organ from Fig. 91, highly 
magnified. Z. F, oc. 2. 
Fig. 91. — Section in front of a gill-cleft of T. ocellata. Z. A, oc. 2. 
Fig. 94a. — The black portion of this section highly magnified to show growth 
and extension of the lateral sense-organ epithelium. 
Fig. 95. — Section behind a gill-cleft of T. ocellata. Z. A, oc. 2. 
Fig. 95 a. — The blackened portion of this section highly magnified, to show 
growth and extension of lateral sense-organ epithelium. Some cells wander 
into mesoblast to form ganglion-cells. 
Fig. 96. — Glossopharyngeal ganglion and its sense organ in three-days’ 
Chick, from Fig. 90. Z. C, oc. 2. 
Fig. 97. — Section of hind-brain of a Chick embryo with nine somites, 
showing “ Zwischenstrang” ( Z .) and its relation to ganglion Anlage, 
Z. F, oc. 2. 
Figs. 98 and 99. — Sections of trunk region of Chick embryo of second 
day. Z. F, oc. 2. 
Fig. 100. — Portion of longitudinal vertical section of mid-brain of a lizard 
embryo (L. agilis), showing origin of oculomotorius and its “ ganglion ” in 
brain. Z. D, oc. 2. 
Fig. 101. — Portion of longitudinal vertical section of the auditory epithe- 
lium of a lizard embryo (L. agilis). Z. F, oc. 2. 
Fig. 102. — Section, trunk region of a Chick embryo of second day. Z. F, oc. 2. 
Fig. 103. — Section through glossopharyngeus nerve and ganglion of an 
advanced Torpedo ocellata embryo. Z. C, oc. 2. 
