154 Proceedings of the Royal Irish Academy. 



basal swellings ; the four inner cycles have basal swellings, but these may 

 be much reduced: tentacles often streaked longitudinally with brown. 



VII. Xone of my sections shows any trace of ciuelides. In order to discover 

 whether there were any. I opened out the greater part of the wall of a specimen 

 which was so distended that it was transparent, removed the mesenteries, and 

 examined it with lens and microscope, by reflected and transmitted light ; but 

 no trace of a cinclis could be found. .V I :i dissected specimens showed 

 that here six, and onh ilarly developed pairs of mesenteries are perfect : 

 there were no additional - Eight of th 

 specimens, in which the gonads were well del showed that all the 

 primary mesenteries were sterile in each case. 



VIII. The other (longing to the genus Actinauge, and which are 

 most related : A. . > i McbL - (A. nodosa, \a.r. coron 

 Verrill), and A. FerriUii McM. (• A Verrill). Both of these show 

 quite clear external •': — they have forty-eight capitular 

 ridir id >>( twelve only), and nil the tentacles have basal swellii _-. 

 whereas in A nly the four inner cycles have them. To support 

 thee noes, there are other anatomical ones. 



IX. In - - one ] aaibility connected with these 205 speci- 

 mens which Bhonld m It is not impossible that we have here 

 representatives of hall n similai which cannot be distinguished 

 from one another when di ot anatomically), but which would 

 be clearly distinct when alive. ip containing Sogari 



• iie in which stinct enough when alive, but 



I should not like - m when Similarly, Bolocera 



unot be confused 



at when dead it is a different matti shown above, 



the: lilar. Bui ' this is the case with Actinauge. then 



the: means of deciding it ation of freshly collected 



living specimens, so, as far as I am at, it must be left out 



at 



GENERAL NOTE ON CELLS OF THE MES0GL0EA. 



It has not seemed worth while to add il note about the structure 



of the ilt with in tin- collection of Actiniaria 



dniost the same words would have to i,.- used 



In all i oid cells in the matrix of the 



mesogloea. Whether their form is at all constant in one species or not, 



