274 
PACIFIC SCIENCE, Vol. XIII, July 1959 
Sagitta enflata Grassi, 1883 
X enflata, Michael, 1908, 1911; Bieri, 1957 
S. inflata, Baldasseroni, 1915 
Body flaccid, transparent, with marked constriction at the tail-septum. Tail segment 14-18 
per cent of total length; hooks 8-9; anterior teeth 4-10; posterior teeth 7-15. Anterior fins 
rounded, removed from ventral ganglion by a distance greater than the length of the fin, 
narrower than posterior fins. Posterior fins do not touch seminal vesicles, widest at level of 
tail-septum, or a little anterior. Caudal fin joining seminal vesicles. No collarette. No intestinal 
diverticula. Seminal vesicles round. Ovaries short. 
BODY LENGTH 
IN MM. 
LENGTH OF TAIL 
SEGMENT (in °/o OF 
TOTAL BODY LENGTH) 
HOOKS 
ANTERIOR 
TEETH 
POSTERIOR 
TEETH 
Eastropic specimens: 
11.8 
16.1 
8-9 
9-10 
13 
11.3 
16.5 
9 
7 
13 
10.1 
15.7 
8 
6 
10 
10.0 
14.0 
9 
7 
11 
6.0 
16.3 
9 
4 
7 
Hidas specimens: 
15.6 
17.9 
9 
10 
12 
15.4 
15.6 
9 
10 
15 
14.3 
16.1 
9 
6 
12 
12.6 
15.1 
9 
6 
13 
12.0 
15.0 
9 
7 
11 
Sagitta ferox Doncaster, 1903 
S. ferox, Bieri, 1957 
Body firm, opaque, short and robust, of 
equal width for most of the length of body seg- 
ment. Tail segment 
: 22-28 per cent of total length; hooks 6-7; anterior teeth 6- 
-13; posterior 
teeth 4-12. Anterior fins reach the posterior end of ventral ganglion. Posterior fins and tail 
fin close to, or touching, seminal vesicles. 
Posterior fins longer 
than anterior fins. Collarette 
present. Intestinal diverticula present; often removed from neck. Seminal vesicles angular, 
with anterior edge 
slanting postero-laterally. Ovaries when ripe containing cuboidal ova that 
fill body cavity. 
BODY LENGTH 
LENGTH OF TAIL 
ANTERIOR 
POSTERIOR 
IN MM. 
SEGMENT (in °/o OF 
HOOKS 
TEETH 
TEETH 
TOTAL BODY LENGTH) 
Eastropic specimens: 
9.0 
24.4 
6 
10 
8 
8.4 
26.2 
7 
8 
10 
8.2 
24.4 
7 
12 
9 
7.8 
24.4 
7 
8 
12 
