E. OWENI. — SPICULATION. 



211 



I claim DO more tliaii approximate correctness for the figures 

 ill tlie above table. In specimens E and Q, instead of the 

 number of longitudinal beams at the upper end, I have counted 

 that of the sieve-plate beams arising therefrom ; these were found 

 to number 38 and 49 respectively. 



The majority of the meshes of the skeletal framework are 

 perforate, that is to say, they each inclose a parietal osculum. 

 The so-called interstitial or imperforate meshes occur, several 

 in succession one behind the other, between any two, relatively 

 closely situated, longitudinal beams ; they also occur isolatedly, 

 without any regularity as to their distribution. 



The spicules are always and everywhere free. I find this 

 to be the case even in the largest specimen (Ç) before me. 



Spiculation. 



Under this head, my studies go essentially to confirm our 

 previous knowledge as derived especially from F. E. Schulze'« 

 works ('87, '95). Moreover, there exists no marked difference 

 between the spiculatiou of this species and that of E. marshalli 

 or E. iviperialis. I may therefore be brief in my account. 



