Eastropic Chaetognatha — SUND 
273 
BODY LENGTH 
IN MM. 
LENGTH OF TAIL 
SEGMENT (in °/o OF 
TOTAL BODY LENGTH) 
HOOKS 
ANTERIOR 
TEETH 
POSTERIOR 
TEETH 
Eastropic specimens: 
8.0 
26.3 
8 
4 
9 
6.4 
23.0 
8 
5 
10 
Tokiokas specimen: 
11.7 
21.4 
8 
7 
13 
Hidas specimens: 
11.7 
25.6 
7 
4 
10 
11.5 
25.2 
6 
5 
11 
11.1 
25.2 
6 
5 
11 
10.7 
23.5-27.1 
7-8 
4-6 
9 
Sagitta decipiens Fowler, 1905 
S. decipiens, Michael, 1908 
Body delicate, moderately opaque. Tail segment 22-27 per cent of body length; hooks 5-7; 
anterior teeth 7-10; posterior teeth 13-20. Anterior fins start just posterior to ventral ganglion. 
Posterior fins widest at level of tail-septum, lying mostly on body segment, 
, not reaching 
seminal vesicles. Caudal fin touching seminal vesicles. Intestinal diverticula present. Collarette 
absent. 
BODY LENGTH 
LENGTH OF TAIL 
ANTERIOR 
POSTERIOR 
IN MM. 
SEGMENT (in °/o OF 
HOOKS 
TEETH 
TEETH 
TOTAL BODY LENGTH) 
Eastropic specimens: 
11.0 
23.0 
5 
9-10 
17 
10.0 
23.0 
6 
8 
17 
9.2 
25.0 
5 
7 
17 
8.8 
22.7-23.8 
6-7 
8-9 
13-20 
8.6 
26.7 
6 
9 
16 
EXPLANATION 
OF PLATE I 
(Ail figures drawn from preserved material, some 
Fig. 9. 5. neglecta, 7.3 mm. specimen. 
with the aid of photographs; semidiagrammatic.) 
Fig. 10. S. pulchra, 19.7 mm. specimen. 
Fig. 1. S. hedoti, 10.0 mm. specimen. 
Fig. 11. 5. regularls, 5.1 mm. specimen. 
Fig. 2. S. bipunctata, 10.6 mm. specimen. 
Fig. 12. S. robusta, 17.0 mm. specimen. 
Fig. 3. 5’. decipiens, 7.8 mm. specimen. 
Fig. 13. S. serratodentata paclfica, 12.5 mm. specimen. 
Fig. 4. S. enflata, 12.6 mm. specimen. 
Fig. 14. S. pseudoserratodentata, 11.2 mm. specimen. 
Fig. 5. S.ferox, 7.6 mm. specimen. 
Fig. 15. S. tenuis, 9.5 mm. specimen. 
Fig. 6. S. hexaptera, 44.9 mm. specimen. 
Fig. 16. K. paclfica, 6.5 mm. specimen. 
(Note change of scale.) 
Fig. 17. K. subtllls, 11.2 mm. specimen. 
Fig. 7. S. lyray 13.2 mm. specimen. 
Fig. 18, E. hamata, 13.6 mm. specimen. 
Fig. 8. S. minima, 6.5 mm. specimen. 
Fig. 19 . jP. draco, 7.2 mm. specimen. 
