250 Chapter 7 Chaetognaths
!Omm
1 - - - - - 1 A
100!-lm
1
B
@
1 mm
f----------l B
c
1 mm
D
Fig. 7.2.1A-D. Sagitta gazellae. A Whole animal dorsal view; B detail of head; C eye; D detail of posterior end of tai! and
seminal vesicles. (Alvariflo 1969)