No. 3-] 
LATERAL LINE OF AMIA. 
539 
EXPLANATION OF PLATES. 
INDEX LETTERS. 
a, anal fin. 
a/, anterior dorsal pit lineof head. 
. accessory lateral line. 
. sense-organ of lateral line. 
. anterior nasal aperture. 
. angular. 
. antorbital. 
av, auditory vesicle. 
ramus buccalis facialis. 
¢. caudal fin. 
canal of lateral line. 
mandibular canal. 
D. dentary. 
dl. dorsal pit line of body. 
. sense-organ of dorsal pit line. 
cp. epiphysis. 
ethmoid. 
. extrascapula. 
facial ganglion. 
. frontal. 
G. gular. 
. glossopharyngeal ganglion. 
gf. gular pit line. 
. gular plate. 
Af. ramus hyoideus facialis. 
truncus hyoideo-mandibularis 
facialis. 
Ai. horizontal line pit of cheek. 
. interoperculum. 
zg. infra-orbital groups of pores. 
zo. infra-orbital sense-organs. 
zp. infra-orbital primary pores. 
217 om\' g. double pore at union of in- 
fra-orbital and operculo- 
mandibular canals. 
217 om1 g. double group of pores at union 
of infra-orbital and oper- 
culo-mandibular canals. 
72 7/1 ~. double pore at union of infra- 
orbital and lateral line ca- 
nals. 
215 si », double pore at union of infra- 
orbital and supra - orbital 
canals. 
215 s7 ¢, double group at union of infra- 
orbital and supra - orbital 
canals. 
® st g. 
7G. 
LA, 
1b. 
li. 
d.md. 
dom. 
double group at union of infra- 
orbital and supra - orbital 
canals, 
jugal. 
lachrymal. 
surface organs. 
line of infra-orbital canal. 
mandibular line of pit organs. 
line of operculo-mandibular 
canal. 
. line of antorbital cross-com- 
missure. 
. line of supra-orbital canal. 
line of supra-temporal cross- 
commissure. 
. lateral line. 
. lateral line group of pores. 
lateral line sense-organs. 
. lateral line primary pores. 
line of mandibular canal. 
ramus mandibularis externus 
facialis. 
ramus mandibularis internus 
facialis. 
ramus mandibularis facialis. 
middle dorsal pit line of head. 
. maxilla. 
- maxillar”. 
= Masale 
. nervus linez lateralis. 
. nasal pit. 
. nasal tube. 
operculo-mandibular group of 
pores. 
operculo-mandibular sense-or- 
gans. 
operculo-mandibular primary 
pores. 
. operculum. 
; ramus opthalmicus facialis. 
. pectoral fin. 
. parietal. 
. posterior dorsal pit line of 
head. 
posterior nasal aperture. 
pre-opercular fold. 
pre-operculum. 
