NORTH AMERICAN EARLY TERTIARY BRYOZOA. 

 Genus ADEONELLOPSIS MacGillivray, 1886. 



563 



18S6. Adconellopsis MACGILLIVRAY, Description of Xew Polyzoa, pt. 0, Transactions Kojal 

 Society Victoria, p. 7. 



"The zooecia provided i;i the central line with one or several ascopores" (Lev- 

 insen). The ascopores are grouped at the base of a cribriform area. Interzooecial 

 avicularia and gonoecia are present. 13-16 tentacles. 



K x20 



FIG. 169. Genus Adeonellopsis MacGillivray, 1886. 

 A-E. AileoiieUopsis foliacea MacGillivray, 1886. A. Four zooecia, X 55. B. Group 'of zooecia, 

 including a gonozooecium, X 40. C. Operculum, X 140. D. Avicularian mandible, X 100. 

 E. Interior of zooecia as seen from basal surface. X 40. showing ascopore, apertura, and 

 parietal areolae. (A-E after Levinsen. 1909.) 



F-K. Adeonellopsis (Critricellui ijixtfnnn Busk. 1858. F, G. Fragment of zoarium. natural 

 size and X 50. H. Operculum. I. Mandible. (F-I after Busk, 1884.) J. Young zooecia, X 20. 

 K. Old zooecia, X 20. (J, K after Mine. Guerin Ganivet, 1911.) 



Genotype. Adeonellopsis fol/<teea MacGillivray, 1886. 



Range. Wilcoxian Recent. 



We are entirely ignorant of the physiological use of the stellate pores, and 

 also of the true mechanism of the hydrostatic system in the majority of the species. 



The gonoecia are not alway* apparent: certain species are deprived of them; 

 on others they are distinct but little different from the other zooecia. 



Historical. Incompletely defined in isSfi by MacGillivray, this genus has for 

 a long time remained unrecognized. In 1900 Maplestone created a genus Ovaticclla 



