78 



ACTINIARIA 



Fig. 99. 



Textfigs. 94 — loi. Limnactinia lacvis. 

 Fig. 94. Transverse section of a specimen with 8 perfect mesenteries in the 

 upper part of the actinopharynx. — Fig. 95. A similar section of the same 

 specimen in the lower part of the actinophar3'nx. — Fig. 96. Transverse 

 section of a specimen with 10 perfect mesenteries. — Figs. 97 — loi. Trans- 

 verse sections of a mesentery in the reproductive tract. If we indicate the 

 first section (fig. 97) withi, the following sections are the foiu-th, the eighth, 

 the sixteenth and the twentv-third. 



to the mesogloea as an even lamella. The fifth couple \-iz. the ventral mesenteries of the dorsolateral 

 pairs, project as imperfect mesenteries a little over the surface of the endoderm; in this state they carry 

 very undeveloped filaments, but no reproductive organs, figs. 94, 95. The mesenteries of the sixth couple, 

 viz. the ventral mesenteries of the ^'entrolateral pairs, are always very weak and only a little stronger than 

 the mesenteries of the second cj'cle. 



The ten stronger mesenteries are provided with stomata. As in Scytophorus antardicus there are 

 several stomata distally placed in each perfect mesenterj-, the}' do, however, seem to be less numerous (unto 



