294 
I-VII. 
1-7. 
2,8, 
V. md. 
V. mz. 
V. opt. su, 
V. opt. p fad. 
V. rx. maj. 
V. rx. min. 
VII. ac. 
VII. buc. 
VIL. hoi. 
VIL. opt. su. 
a, B, Y. 
af. 
a. 
abd. 
ao. d. 
are. vse. L 
ar ent, 
au. 
ax-cyl. 
brs. vse, 1-6. 
cav. a. 
cbl, 
cd. 
cl. crs, n. 
el. ms-ce. 
cl. n’bl, 
coms, A. 
coms. d. 
AND PLATES. 
Posterior limit of cephalic 
plate. 
Encephalomeres. 
Somites (van Wijhe’s). 
Cavities of head somites 
2, 3. 
Ramus mandibularis tri- 
gemini. 
R. maxillaris trigemini. 
R. ophti. 
trigemini. 
R. opth. profundus trig. 
Radix major trigemini. 
“ 
superficialis 
minor trigemini. 
Ramus acusticus facialis. 
Mea waenligass Ft 
hyoideus “ 
ophth. superfici- 
alis fac. 
Position of frontal sec- 
tions (Figs, 36, 87, 38). 
(Fig. C.) Position of 
section (Fig. D). 
“ Anterior cavity ” (Figs. 
B, C, E). Ventral fibre 
tract (Fig. F). 
Abducens nerve. 
Dorsal aorta. 
Visceral arch 1. 
Archenteron. 
Auditory invagination 
(otic vesicle). 
Axis-cylinder process. 
Visceral pouches 1 to 6. 
Platt’s somite (anterior 
cavity). 
r Anlage of cerebellum. 
Chorda dorsalis. 
Neural-crest cells. 
Cells of mesocephalic 
ganglion, 
Neuroblastic cell. 
Anterior commissure, 
Dorsal a 
[73 
“ 
coms. pP. 
COMS, SU. 
ec’drm. 
en’drm. 
ent, 
Jis. vse. 1-6. 
yls-phy. 
gn. ac-fac. 
gn. fac. 
gn. Gas. 
gn. gls-phy. 
gn. ms-ce, 
gn. trig. 
gn. spi. 
gn. vag. 
vfb, 
la, ct. 
la. mu, 
m-b, 
mu. ob. su, 
mu. rt. SU. 
mu, rt. a, 
my cal. 
myl-mer. 
my-Im. 
n-po. 
oc-mot, 
prenc. 
Tx: Y. 
SO. 
tb. n. 
thl. 
treh. 
vag. 
vn. erd. 
vs, opt. 
BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY, 
ABBREVIATIONS COMMON TO ALL FIGURES OF TEXT 
Posterior commissure. 
Superior Mh 
¿ctoderm. | 
Entoderm. 
Entoderm. 
Visceral clefts 1 to 6. 
Glossopharyngeus nerve. 
Ganglionic Anlage of 
acustico-facialis. 
Ganglion of 
facialis. 
Gasserian ganglion. 
Ganglion of glossopha- 
ryngeus. 
Mesocephalic ganglion. 
Ganglionic Anlage of the 
trigeminus nerve. 
Spinal ganglion. | 
Ganglionic Anlage of the | 
Vagus, | 
Infundibulum. 
Lamina cutis (cutis 
plate). 
Lamina muscularis (mus- 
cle plate). 
Midbrain. 
Superior oblique muscle. 
= rectus muscle. 
Anterior rectus muscle. 
Myoceele. 
Myelomere. 
Myotome. 
Neuropore. 
Oculomotorius nerve, 
Prosencephalon, 
acustico- 
Ventral root of nerve, 
Somite. 
Neural tube. 
Thalamic portion of the 
trigeminus Anlage. 
Trochlearis nerve. 
Vagus nerve. 
Vena cardinalis. 
Optic vesicle. 
