PLATE XII 



Figs. 1-3. A left-handed specimen from Lanzarote, no. 3, float-length 

 9 cm., gas-gland diameter 2-3 cm. Cormidia IV, III, and II seen 

 from the aboral end to show similarity of pattern of all cormidia, 

 and acceleration of growth in those at the aboral end. Terminal 

 lateral groups at top right, lee-branches on left and aboral branch 

 in centre, x 1-3. 



Fig. 4. The same specimen as in figs 1-3. Cormidium IV seen from 

 the oral end to show the characteristic gastrozooid and gonophore 

 of group 1 (black background), x 2-2. 



Fig. 5. The same specimen as in figs. 1-3. Cormidium II seen from 

 the aboral end to show lee-branches (top left), terminal lateral 

 groups (top right), aboral branch (centre, black background) and 

 gonodendron of group 1 (main), x 2-6. 



