Descriptions of New, or Little Known, Polyzoa. 99 



Fig. 2. Operculum of G rigida, posterior view, to show the 



attachment of the occlusor muscles. Fig. 2a. Anterior 



view of the same. 

 Fig. 3. Opercula of G. Australia. Fig. 3a. Avicularian 



mandible of the same. 

 Fig. 4. Opercula of G fistulosa, from a Mediterranean speci- 

 men. Fig. 4a. Avicularian mandibles of the same. 

 Fig. 5. Operculum of G. sinuosa, from a Mediterranean 



specimen, showing processes for the attachment of the 



muscles. 

 Fig. 6. Operculum of G hirsuta. 

 Fig. 7. Operculum of G. tenuirostris. It will be seen that 



the lower edge is more deeply hollowed than in the 



next. 

 Fig. 8. Operculum of G gracilis. 

 Fig. 9. Maplestonia cirrata, natural size. Fig. da. Portion 



magnified, anterior view. Fig. 96. Posterior view. 

 Fig. 10. Tubulipora concinna, natural size. Fig. 10a. 



Portion magnified, showing two ovicells. Fig. 106. 



Portion more highly magnified. 



Plate II. 



Fig. 1. Tubulipora pulchra, natural size. Fig. la. 

 Lobule magnified, showing an ovicell. Fig. 16. Portion 

 more highly magnified. The wrong scale has been 

 accidentally placed to this figure ; it should be the same 

 as that in Plate I., fig. 106. 



Fig. 2. Tubulipora connata, natural size. Fig. 26. Portion 

 magnified. 



Fig. 3. Tubulipora clavata, natural size. Fig. 3a. One of 

 the branches magnified. 



Fig. 4. Favosipora rugosa, natural size. Fig. 4a. Portion 

 magnified. Fig. 46. Small portion more highly magni- 

 fied, showing the openings of the cells and the punctate 

 calcareous membrane. The wrong scale has also been 

 put to this figure ; it should be the same as in Plate I, 

 ^g. 106. 



Plate III. 



Fig. 1. Diastopora lineata, natural size and magnified. 

 Fig. 2. D. fasciculata, natural size and magnified. On the 



left of the magnified figure a portion of the lamina is 



shown. 



h2 



