929, HIROSHI OHSHIMA 
Water-vascular System.—No marked change is 
found in the water-vascular system. The tentacles have some 
TExtT-FIGS. 6-8. 
TEXT-FIG. 6. 
Pentactula viewed from ventral side. x 60. 
TEXT-FIG. 7. 
Same, but still advanced, being beset with branched tentacles and the 
third pedicel. x 60. 
TEXT-FIG. 8. 
Nine-tentacled young, 1-3 mm. long. Ventral view to show the order 
of appearance of tentacles and pedicels (no. 2 represented in 
Table III in the text). x30. g=gut; lp= lateral pedicel ; 
mv = mid-ventral radial canal; P,p,,,= primary pedicels ; 
Ps, = Secondary pedicels; pv = Polian vesicle; rt = rudiment 
of respiratory tree; 7’, t,_, = primary tentacles ; ¢, , = secondary 
tentacles, 
simple branches and stand at the anteriormost end of the body 
(Text-fig. 6, t, ;), while the primary pair of pedicels are growing 
