ACTINIARIA 



103 



Textfig. 128—133. 

 Peachia hastata. 

 Transverse sections of 

 pennons ot perfect me- 

 senteries in the repro- 

 ductive tract (fig. 128, 

 130, 131) and in the 

 cnido-glandular tract 

 (fig. 129). In the figure 

 130 also an imperfect 

 mesentery is reproduced 

 (to the right). The pen- 

 non in fig. 130 is from 

 a ventral directive ; the 

 pennon reproduced in 

 fig. 131 is from the same 

 section as the mesen- 

 tery in fig. 130. Figs. 

 132, 133. Transversal 

 section of the aboral 

 prolongation of the si- 

 phonoglyphe, fig. 132 in 

 the upper, fig. 133 in the 

 lower part. Both sections 

 drawn under the same 

 magnification a boun- 

 dary zone chn ventral 

 directives. 



Fig- 131 



Fig- 133 



Fig. 132 



of very variable appearance. In the textfigure 130, a directive mesenterium and a mesenterium of the second 

 cycle are sketched in the reproductive region, the text figure 128 shows a transverse-section of a perfect 

 mesenterium in the vicinity of the sections reproduced above, and the textfigure 129 a perfect mesenterium 

 in the region of the glandular tract (the last section has been taken from another individium having no reproduc- 

 tive organs). Commonly the inner part of the pennons is more ramificated than the outer part. The lon- 

 gitudinal pennons and the parietal muscles fuse together without distinct hmits. The part of the parietal 

 muscles on the opposite side of the pennons is weak, distinctly definite, with the strongest folds on the inside. 

 The mesenteries of the second cycle have produced small pennon-like formations, close to the insertions of 

 the mesenteries. The inner parts of these formations are curved towards the exocoels, the parietal muscles 

 are not particularly differentiated here. The parietal muscles are not spread over the column. 



