PLATE XIX 



Fig. i. A young right-handed specimen from Arrecife, no. Juv. 8, 

 float-length 30 mm., gas-gland diameter 5 mm., to show: oral zone 

 with five cormidia ; the basal internode between the oral and main 

 zones ; the large gastrozooid of group 1 of cormidium VII ; and the 

 protozooid and larval tentacle, x 3-8. 



Fig. 2. Part of the oral zone of a left-handed specimen, Lanzarote, 

 no. 25. Cormidia 1 and 2 seen from above. The finger-shaped 

 projection (left centre) is the main series of lateral groups (axis 

 filled with black gelatine). See schematic drawing, Text-fig. 12C, 

 D. x i-8. 



Fig. 3. The same specimen seen, tilted back, from the aboral end 

 and windward side to show: main series of lateral groups of 

 cormidium 1, filled with black gelatine; lee-branch of cormidium I 

 top left ; aboral branch of cormidium 1 ; the peculiar gonodendron 

 of group 1 of cormidium I top right; gastrozooid of group 2 of 

 cormidium 1 overlying large ampulla of tentacle 2; gastrozooids 

 of groups 3-6 of cormidium 1, bases filled with black gelatine; 

 tentacle 8 of cormidium 1, just left of GZ 6 ; ampulla of tentacle,, 

 just to left of T 6 . x i-8. See schematic drawing, Text-fig. 12 C. 



Fig. 4. Specimen Lanzarote, no. 25. Oral zone of cormidium 1 seen 

 from the aboral end, showing: GZ 1 top right; series of lateral 

 groups, right top centre to left centre foreground ; lee-branch top 

 left; aboral branch left centre, x 5-4. See schematic drawing, 

 Text-fig. 12 C. 



Fig. 5. The same cormidium seen from the oral end to show: GZ 1 top 

 left; GON x left; lee-side of lateral groups centre; lee-branch right. 



x 5'4- 



