ILLUSTRATIONS VII 



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4. Outline drawings of the ganglion and neural gland 206 



5. Pyrosoma atlanticum paradoxum 208 



6. An embryo of Pyrosoma giganteum (?) 209 



7. Diagrams to show the position of the organs in a Pyrosoma 



cyathozooid and a Salpa, solitary form 210 



8. A diagram of an end view of a colony of Pyrosoma aherniosum, 



with the zooids projected onto one plane 212 



9. A diagram similar to Figure 6, but illustrating an older colony 213 



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