246 



GEORGE T. HARGITT. 



Figs. 7, 8, 9 show only the bud and the tissues immediately 

 adjoining. The same general features already noted are also seen 

 here. In Fig. 7 the muscular pad on each side of the base of 

 the bud is nearer the same size than in Fig. 6. The relation of 

 the^entoderm of the bud and tentacle is shown in about the same 



j 



way, but the arrangement of the bud entoderm into two rows is 

 not so distinctly marked. In Fig. 8 this arrangement of ento- 

 dermfis scarcely indicated, the cells being more or less massed 

 together and not showing any apparent regularity. The charac- 

 ter of the tissue of the muscular pad is shown better as are also 

 the ectodermal ridges. The cavity at the distal end of the bud 



FIG. 7. 



is larger than shown in the other figures. In Figs. 8 and 9 the 

 muscular pad is shown on only one side of the base of the bud, 

 showing that the bud is not completely surrounded by it, a feature 

 also indicated in Figs. 3 and 5, where the pad is seen to have a 

 notch or sinus on one side. Fig. 9 represents a section cut one 

 side of the long axis of the bud, so that the entoderm of the 

 bud and tentacle is not continuous. 



It will have been noticed that in all the figures the bud is solid 

 with the exception of a cavity at the distal end. Perkins (of. cit., 

 p. 785) referring to the development of the normal tentacle states 



