THE THICK-HORNED ANEMONE. 405 



tion from the characters I had jotted down akeady ; 

 but one specimen had adhering to its base two very- 

 young ones, one about a line in diameter, the other 

 not more than one-third of a line. Examination with 

 a lens revealed no difference either in form or colour 

 between these and the adult ; the condition of their 

 skeleton is unknown, as I did not choose to destroy 

 the infant specimens. 



Plate XXVr, fig. 1 represents the Scarlet and Gold 

 Madrepore expanded ; magnified. 



Fig. 2. The same of the natural size, contracted. 



3. A tentacle, greatly magnified. 



4. A tentacle of Caryoplujllia Smithii, for 



comparison. 



5. Filiferous capsules. 



THREAD-CAPSULES OF ACTINIA. 



I have been dissecting a fine specimen of Actinia 

 crassicornis. The interspaces of the abdominal septa 

 I found filled with the ovigerous tubes, so-called. 

 When examined closely these are seen to consist of a 

 narrow ribbon, about half a line in width, convoluted 

 and puckered in a very irregular manner, but having 

 a tendency to form spiral turns, of a whorl, or a whorl 

 and a half, each ; the ribbon itself being nearly flat, 

 and one of its edges being the axis of the spire. The 

 ribbon consists of tw^o parts ; a yellowish-brown mass 

 occupies the portion next the axis, for about three- 

 fourths of the breadth ; the remaining fourth is an 

 exterior border of pellucid substance. I placed some 

 of the whorls under the microscope, and observed the 



