PLATE G 



EXPLANATION OF FIGURES 



23 and 24 Sections of a specimen which showed no certain external evidences 

 of division. The slight irregularity in the incomplete mesenteries shown at X 

 in figure 23, and especially the irregularities in the incomplete mesenteries of the 

 corresponding region in figure 24, indicate that two regenerations have occurred. 

 The older is represented by the upper portion of the figures. The greater de- 

 velopment of c, figure 24, shows it to be an old bounding mesentery of the older 

 of the two divisions. X 35. 



25 Section of a diglyphic specim^en with two white bars and twelve orange 

 stripes distributed as shown in figure 39. Sections showed no certain evidence 

 of division, although the slightly greater development of incomplete mesenteries 

 near the directives below suggests that this may be an older part. Pairs of 

 complete non-directive mesenteries are here indicated by c. An acontium may 

 be seen protruded through a cinclis in an incomplete endocoel of the second 

 grade at a. A pair of mesenteries of the fourth incomplete cycle is present near 

 the directives below. X S. 



26 Section of a perfectly regular diglyphic siieciiren with two white bars 

 opposite each other on the oral disc and twelve orange stripes symmetrically 

 placed and evenly spaced on the column. Internally no evidence of division. 

 Pairs of directives are indicated bv d. X 14. 



254 



