Plate 7. 



Obelia striata, page 9. 

 The figures are from camera drawings finished by J. H. Emerton. 

 Fig. 1. Basal part of a colony with gonothecae. x 80. 

 Kg. 2. Distal end of a colony, x 80. 

 Fig. 3. A piece of the hydrorhiza, with gonothecae. x 80. 

 Fig. 4. The distal end of a hydrotheca showing the deeply fluted margin more highly 



magnified. 

 Fig. 5. A colony growing on a small shell, natural size. 



