118 Descriptions of JS T eiv, or Little Known, Polyzoa. 



EXPLANATION OF FIGURES. 



Plate I. 



Fig. 1. Urceolipora nana. Fig. la. Two cells more highly magni- 

 fied. Fig. lb. Portion of branch' showing two ovicells, from a 

 specimen mounted in balsam, and seen by transmitted light. 



Fig. 2. Maplestonia simplex, natural size. Figs. 2a and 26. Front 

 and back views of portion of the same. 



Fig. 3. Catenicella gracilenta. Fig. 3a. Back view of the same. 



Fig. 4. Tubucellaria cereoides, natural size. Fig, 4a. Portion of 

 the same magnified.' 



Plate II. 



Fig. 1. Beania Wilsoni, front view. Fig. la. Back view of single 



cell. 

 Fig. 2. Membranipora bimamillata. 

 Fig. 3. Membranipora porcellana. Fig. 3a. Portion of the same 



more highly magnified. The wrong scale has been accidentally 



given ; the enlargement is about twice that of the other figures. 

 Fig. 4. Schizoporella cryptostoma, portion near the edge of the 



zoarium. Fig. 4a. Group of cells from the same specimen, 



showing ovicells and avicularia. 

 Fig. 5. Cellepora munita, natural size. Figs. 5a and 5b. Portions 



magnified. Fig. 5c. Operculum, more highly magnified. 

 Fig. 6. Lekytliopora hystrix, to show the form of the primary mouth. 



Fig. 6a. Operculum. 



Plate III. 



Fig. 1. Cellepora longirostris, natural size. Fig. la. Portion 



magnified. 

 Fig. 2. Cellepora platalea, group from the growing edge. Fig. 2a.- 



Group of old cells, showing the avicularium and ovicells. 



There is too marked a sinus in the lower lips of the cells, which 



should be nearly straight or slightly hollowed. 

 Fig. 3. Cellepora Costazii. Fig. 3a. Ovicells of same. Fig. 3b. 



Single cell, with small avicularium on high process. 



