Eastropic Chaetognatha — SUND 279 
Eastropic specimens: 
13.6 
28.0 
6-7 
7 
12 
13.2 
27.3 
7 
10 
14 
12.7 
26.0 
5-7 
10-11 
14-15 
12.5 
25.6 
6-7 
10 
13 
9.5 
26.3 
6 
9 
12-13 
9.3 
28.0 
7 
6-7 
10 
8.6 
25.6 
6 
11 
12 
Tokioka s specimen: 
16.4 
26.6 
6 
8 
8 
Hidas specimens: 
13.0 
26.9 
6 
9 
14 
11.9 
24.4 
7 
10 
12 
11.1 
27.0 
6 
8 
13 
10.0 
27.0 
7 
8 
12 
Sagitta serratodentata pacifica Tokioka, 1940 
S. pacifica, Bieri, 1957 
The nomenclature employed for the S. serratodentata group is that suggested by Tokioka 
(1952). The synonyma are discussed by Furnestin (1953). 
Body firm, opaque. Tail segment 22-25 per cent of total length; hooks 5-7; anterior teeth 
5-11; posterior teeth 8-24. Anterior hns tapering, narrower than posterior fins; extending 
anteriorly to posterior end of ventral ganglion. Posterior fins widest behind tail-septum; 
close to, or touching seminal vesicles. Seminal vesicles greatly expanded anteriorly, armed 
laterally with 3-10 chitinous spines. Ovaries containing large cuboidal ova. Collarette small, 
or absent. Intestinal diverticula absent. 
BODY LENGTH 
LENGTH OF TAIL 
ANTERIOR 
POSTERIOR 
IN MM. 
SEGMENT (in °/o OF 
TOTAL BODY LENGTH) 
HOOKS 
TEETH 
TEETH 
Eastropic specimens: 
12.5 
23.2 
6 
10 
17 
12.4 
22.5 
6 
11 
23 
11.4 
22.0 
6 
10 
19 
10.8 
24.0 
5 
8 
19 
10.6 
23.5 
6 
9 
20 
10.5 
22.9 
8 
15 
10.0 
25.0 
6 
7 
15 
9.6 
20.8 
7 
8 
13 
okas specimens: 
13.0 
23.5 
5 
7 
13 
12.4 
23.4 
5 
9 
18 
12.2 
23.0 
7 
9 
18 
12.0 
24.2 
6 
9 
17 
