PLATE 1 



EXPLANATION OF FIGURES 



1 Colony of S. luciae photographed through the vertical sides of an aquarium. 

 A number of specimens, such as that indicated at 1, are ensconced in barnacle 

 shells The characteristic vertical orange stripes on the column do not appear 

 in the photograph. White bars may be seen crossing the oral discs. These 

 mark the positions of siphonoglyphs. Continuations of the radial white bars 

 frequently border the oral aperture. The individual at 2, has one radial white 

 bar, a monoglyphic specimen. A triglyphic individual with three white bars 

 may be seen at 3. The specimen at 4 has a minute radial projection of the white 

 border which fringes the mouth, giving ground for suspecting some irregularity 

 of internal structure. 



2 A colony seen from above. 1, as in figure 1. 2, individuals each having 

 but one prominent white bar, with extension partially surrounding the mouth, 

 indicating a single well-developed siphonoglyph and, opposite this, a regenerating 

 region in which a white line will eventually appear. 3, a specimen with one 

 broad white bar and one narrower and fainter. The latter is newly formed in a 

 regenerating region. 



3 Microphotograph of cross-section of an anemone (no. 46, table 6) which 

 had but one white bar and gave no external evidence of new tissue, being there- 

 fore apparently monoglyphic. The line of new tissue marked by the loop at X 

 was probably mistaken for an orange stripe. For explanation of symbols, see 

 page 232. X 32. 



4 Photograph at greater magnification of the new part and adjacent struc- 

 tures of section shown in figure 3. X 60. 



5 Similar photograph of the regenerating region of a more aboral section of 

 the same specimen. The loop has opened and appears as two separate mesen- 

 teries, ci, cK X 60. 



244 



