om. muscles of the oviduct. 
os. ovisacs. 
ov. ova. 
p’ first pair of feet. 
pi second “5 
pe third i 
p fourth > 
p” fifth A 
pg. pigment. 
R. right. 
7. rostrum. 
rep. receptaculum seminis. 
rt. rectum. 
rin. retina. 
ry. fin ray. 
S. spermatozoa. 
sbg. subcesophageal 
ganglion. 
sf. sternal fork. 
sg. cement gland. 
sp. spermatophore. 
spg. supra-cesophageal 
ganglion. 
st. stomach. 
t. testis. 
V. ventral. 
va, vagina. 
ud. vas deferens. 
vu. vulva. 
y. opening of digestive duct 
into the stomach. 
z. pore canals. 
Nos. 1 to 18 nerves, as 
follows :— 
1. optic. 
2. antennules. 
3. antenne. 
4, mandibles. 
4a. lateral frontal margins. 
4b. first maxille. 
d. second maxille. 
5a. lateral cephalic muscles. 
6. first maxillipedes. 
7. second maxillipedes. 
8. first feet. 
8a. stomach muscles. 
9. second feet. 
9a. posterior cephalic 
muscles. 
10. third feet. 
11. fourth feet. 
12. abdomen. 
13. fifth feet. 
Puate I. 
Fig. 1. Lepeophtheirus pectoralis, mature female, dorsal 
view. ™ 17. 
Fig. 2. Lepeophtheirus pectoralis, mature male, dorsal 
view. xX 17. 
Fig. 38. Lepeophtheirus pectoralis, nauplus stage, newly 
hatched. 
