230 



HYATT, 



The statoblasts are orbicular and fringed with from 

 twenty to twenty-two short, and thirty-two to thirty-seven 

 long booklets with forked points, making from one to six 

 points to each booklet. Diameters vary from .8 m. m. to 

 .83. In equal parts from 24 to 25. Annulus varies from 



I tot. 



Diam. 24. 



FIG. 21, statoblast from Pennissewassee Pond, Maine. The spines are drawn 

 from various specimens to show the range of variation. 



Remarks. This species was found upon the under side 

 of snags or flat-boards in settlements, underlaid by the 

 common ectocyst as in Pectinatella. This is an even 

 sheet, perhaps in large settlements one-eighth of an inch 

 in thickness. 



The statoblasts are few in number and differ materially 

 from those figured by Professor Allrnan of C. mucedo. 

 The outer edge of the annulus is entire and not scol- 

 loped as in the last named, and the brown sheath of the 

 statoblast is smooth and not covered by minute bosses as 

 in C. mucedo ; the outline of the statoblast in our species, 

 when seen from the side, is also much less symmetrical. 



Cristatella Idee, described by Dr. Leidy, is only about 

 one and three-fourths of an inch in length, and has only 

 seventy-two tentacles, and a statoblast with about seventy 

 spines. 



