DESCRIPTION OF THE PLATES, 



PLATE I. 



Fig. 1. Stenocyatlius vermiformis Pourt., profile of calicle, mag, 7 times (see also Plate III. 

 figs. 11 and 12). 

 The same from above. 



Lophohelia prolifera M.-Edw. & H., nat. size. 

 The same, calicle in profile, showing bud, mag. 3 times. 

 The same from above. 

 Lophohelia exigua Pourt., nat. size. 

 The same, calicle from above, mag. 5 times. 

 Dendrophyllia cyathoides Pourt., nat. size. 

 The same, calicle from above, mag. about 3 times. 

 Thecopsammia tintinnabulum Pourt., nat. slze, 

 The same, calicle fixam above. 

 Coelosmilia fecunda Pourt., nat. size. 

 Parasmilia variegata Pourt., nat. size, 

 Caryophyllia cornuformis Pourt., mag. 4 times. 

 The same, calicle from above. 

 Caryophyllia formosa Pourt., nat. size. 

 Desmophyllum Cailleti Duch. & Mich., nat. size. 

 The same, calicle from above, mag. twice. 



PLATE II. 



Deltocyathus Agassizii Pourt., from above, mag. twice. 



The same, in profile. 



The same, from below. 



The same, variety, from below (see also Plate V., figs. 9 and 10). 



The same specimen, fi'om above. 



Diaseris pusilla Pourt., from above, mag. twice. 



The same, septa in profile, mag. 4 times. 



The same, specimen of fig. 6, from below. 



Thecopsammia socialis Pourt,, mag. 1^ times. 



The same, calicle from above. 



Haplophyllia paradoxa Pourt., nat. size. 



The same, calicle from above. 



The same, vertical section. 



Thecocyathus cylindraceus Pourt., mag. 3 times. 



The same, from above. 



Stylaster complanatus Pourt., nat. size. 



The same, calicle from above, mag. ;jO (imes. 



Cryptohelia Peircii Pourt., nat. size. 



The same, two callclcs, mair. 4 times. 



