PLATE XV 



Fig. I. Periphylla hyacinthina, Steenstrup, forma regina, mihi. Side-view, x i. 



Fig. 2. Periphylla hyacinthina, Steenstrup, forma regina, mihi. Apical view; with 

 characteristic pigmentation of the lappet zone. From St. 414. x i. 



Fig. 3. Periphylla hyacinthina, Steenstrup, forma regina, mihi. See form of pedalia 

 and stomach pouches. Photograph by Dr E. H. Marshall of a specimen from 

 St. 151. X |. 



Fig. 4. Atolla wyvillei, Haeckel, forma typica, mihi. Apical view, x i. 



Fig. 5. Atolla chuni, Vanhoeffen. Oral view with dark background. Photograph of 

 an adult specimen from St. 391, by Dr E. H. Marshall, x i. 



Fig. 6. Phacellophora ornata {YeiiiW). Subumbrellar view, x i. 



