CAMPANULARIA CALICTJLATA. 165 



well-marked ring immediately Mow the cahjcle, and 

 merely crenated or faintly annulated from this point to 

 the base; HYDROTHEC^E campanulate, with an even rim, 

 the walls greatly thickened, so as to give the appearance 

 of a double calycle, and projecting inwards towards the 

 bottom to form a diaphragm, beneath which there is a 

 spherical cavity ; GONOTHEC.E shortly stalked, of an ir- 

 regular oval shape, having a somewhat wavy outline, 

 truncate at the top, and with a wide aperture. 



WHEN I first described this beautiful species, I was fully 

 persuaded that the calycle was really double, that within 

 the outer wall there was a distinct inner cup, which im- 

 mediately enclosed the body of the polypite. I now see 

 that this was an error, and that the peculiar appearance 

 which the species presents is due to a remarkable thicken- 

 ing of the polypary. The terms of my former description 

 must therefore be modified ; but the name caliculata is still 

 sufficiently appropriate. 



The cavity of the hydrotheca, which is enclosed by a 

 considerable thickness of transparent chitine, has all the 

 appearance of an inner cup suspended within the true 

 calycle. The illusion is complete. In shape it resembles 

 an inverted hand-bell, the spherical space at the bottom of 

 it representing the handle. 



The form of the hydrothecee is liable to some variation. 

 Commonly they are not deep, rather wide at the top, 

 narrowing downwards very slightly, and well rounded-off 

 below ; but another type occurs, which is more elongate 

 and tapers off more decidedly, and bears a striking resem- 

 blance to an old-fashioned wine-glass. 



These two forms are generally mingled on the same 

 specimens. The pedicels are not of such a uniform and 

 moderate length as I formerly supposed; they have 

 sometimes as few as 9 or 10, and sometimes as many as 

 20 crenations or more. 



