Eastropic Chaetognatha SUND 
277 
Tokiokas specimens: 
6.1 
19.7 
6 
6 
5.8 
18.9 
5 
5 
9 
4.4 
22.7 
5 
3 
Sagitta neglecta Aida 
5. neglecta, Michael, 1908; Baldasseroni, 1915; Bieri, 1957 
Body firm, semiopaque. Tail segment 27-31 per cent of total length; hooks 6-8; anterior 
teeth 5-7; posterior teeth 13-17. Anterior fins start at ventral ganglion. Posterior fins reach 
seminal vesicles. Caudal fin separated from seminal vesicles by a distance equal to about Vi 
length of seminal vesicles. Seminal vesicles rounded. Ovaries containing rounded ova, extend- 
ing anterior to posterior border of anterior fins. Collarette present. Intestinal diverticula present. 
Few specimens of 5. neglecta were found in the Eastropic material; only one of these was in 
such condition that a complete formula could be obtained. 
BODY LENGTH 
IN MM. 
LENGTH OF TAIL 
SEGMENT (in °/o OF 
TOTAL BODY LENGTH) 
HOOKS 
ANTERIOR 
TEETH 
POSTERIOR 
TEETH 
Eastropic specimen: 
7.3 
27.4 
7 
5 
17 
Sagitta pulchra Doncaster, 1902 
S. pulchra, Michael, 1908; Baldasseroni, 1915; Bieri, 1957 
Body firm, moderately opaque; usually slim, but can be robust and quite transparent; with 
a marked constriction often present at tail-septum as seen from side. Tail segment 16-24 per 
cent of total length; hooks 6; anterior teeth 5-9; posterior teeth 8-12. Anterior fins tapered, 
reaching posterior end of ventral ganglion. Posterior fins shortly separated from seminal 
vesicles; widest posterior to the tail-septum. Caudal fin joining seminal vesicles. Collarette 
present, readily visible. Intestinal diverticula absent. Seminal vesicles shaped as ovals; ovaries 
with small, round ova. 
BODY LENGTH LENGTH OF TAIL ANTERIOR POSTERIOR 
IN MM. SEGMENT (iN °/o OF HOOKS TEETH TEETH 
TOTAL BODY LENGTH) 
Eastropic specimens: 
20.3 
16.3 
6 
7 
12 
20.0 
16.5 
6 
7 
9 
19.5 
16.4 
6 
9 
11 
16.7 
18.0 
6 
8 
10 
14.9 
17.5 
6 
7 
9 
13.9 
18.7 
6 
6 
11 
10.1 
19.8 
6 
7 
10 
