110 
for help in collecting. The important stage of Lernea, 
shown on Plate IV., fig. 6, is drawn from a specimen sent 
by Mr. T. Scott, F.L.S., the author’s father. It was 
found on the gills of a whiting caught in the Bay of Nigg, 
Aberdeen, in 1900, and was the only one met with in the 
course of these investigations. 
EXPLANATION OF PuaTEs. 
Reference Letters. 
a. antennule. 
a antenna. 
av. lateral frontal sucker. 
an, anus. 
b. median frontal sucker. 
bls. blood space. 
c. filament duct. 
cg. filament gland. 
cn. chitin. 
D. dorsal. 
d. opening of spermatophore. 
e. eyes. 
y. filament. 
. ganglia. 
gl. gland. 
SQ 
2. intestine. 
K* left anchor process. 
K? median ,, 
K® right + 
L. left. 
ld. duct of digestive gland. 
Ins. lens. 
ly. digestive gland. 
M. mouth. 
m. mandible. 
ml. muscle. 
ml.a. antennule muscles. 
ml.an. anal muscles. 
ml.f. frontal muscles. 
ml... intestine muscles. 
ml.l. lateral muscles. 
ml.m. mandible muscles. 
ml.maep. first maxillipede 
muscles. 
ml.pt. posterior cephalic 
muscles. 
ml7rt. rectum muscles. 
ml.st. stomach muscles. 
max. first maxilla. 
max second ,, 
map. first maxillipede. 
mexp* second ,, 
nm. nerves. 
ne. nucleus. 
O. ovary. 
od. oviduct. 
@. oesophagus. 
og. optic lobe. 
