PLATE XI 



Figs. 1-3. Oral end of a young left-handed Physalia from Arrecife, 

 float-length 16 mm., to show terminal position of the protozooid, 

 the incomplete septum across its base and the larval tentacle. 



Fig. 1 view from leeward side, fig. 2 from below, fig. 3 from windward 

 side. The largest polyps will become the gastrozooids of the first 

 groups of the five oral cormidia. 



Fig. 4. A right-handed specimen from Arrecife, Lanzarote, no. 24, 

 float-length 105 cm., gas-gland 2-3x1-9 cm. Oral zone of the 

 ventral tract seen from the windward (upper) side. Tentacles and 

 gastrozooids as well as palpons are present. The figure shows the 

 protozooid (bottom left), six cormidia and the basal internode (a 

 black gap at top centre), x i-8. 



Fig. 5. Ventral tract of the same specimen seen from the windward 

 side. Cormidia I-VI of the main zone (on right) separated by the 

 basal internode from five cormidia of the oral zone (on left). The 

 protozooid is at the top, left, x o-8. 



