NORTH AMERICAN EARLY TERTIARY BRYOZOA. 791 



Affinities. This species constitutes a strong divergent type in the genus. Its 

 exterior aspect is absolutely that of Idmonea, its ovicell is exactly that of Ternin. 

 Jt is quite easy to determine in its interfascicular distance greater than in I din u /,/. 

 c.tlantica Johnston, 1S47, and all the other small American species. 



It offers much the same aspect as Idmonea hornesi Stoliczka, but differs from 

 it in the very salient thread separating the zooecia and in the alternation of the 

 fascicles (and not their opposite arrangement) on each side of the median crest. 



Our specimens are in agreement with the figure given by Waters, 1903, but 

 resemble less that of Smitt, 1871. On the latter the first zooecium of each fascicle 

 is isolated, a feature that does not exist on Waters's figure nor on our specimens. 



Idmonea tutnida being an Arctic species, it is curious to find it fossil in an 

 equatorial sea. However, the bryozoa appear much more sensible to the tempera- 

 turn of the bottom than to geographic position. 



o,-(in'i'ince. Middle Jacksonian (Castle Hayne limestone): Wilmington, 

 North Carolina (rare). 



Upper Jacksonian (Ocala limestone) : Chipola Eiver, east of Marianna, Jack- 

 son County, Florida. 



Habitat. Arctic Ocean. 

 Plesiotypes.Czt. No. 65354, U.S.N.M. 



TERVIA GLOBULIFERA, new species. 

 Plate 146, figs. 1-S. 



Description. The zoarium is free, bifurcated almost at right angles; the 

 branches are elliptical in section and short, claviform in length; the posterior 

 face is round, smooth, or slightly wrinkled transversally. The fascicles are formed 

 of seven tubes; they are little salient, close together, invisible on the dorsal. The 

 tubes are flat, visible, separated by a shallow furrow. The ovicell is globular, 

 spherical, quite salient, placed at the bifurcations; the oeciostome is salient, trans- 

 verse, a large lunar crescent in shape. 



-Distance between the fascicles 0.25-0.33 mm. 



Width of the fascicles _ 0.16 mm. 



Measurements. 



Diameter of the largest tube.. _ 0.16 



mm. 



Diameter of the zoarium 1.00 mm. 



Number of tubes in the fascicles 7 



Variations and Affinities. This species belongs to the Tervia tumida group, 

 and without the presence of the ovicell placed dorsally it is impossible to classify 

 specimens generically. It differs from Tervia pyrifera, with which it is associated 

 in globular form of its ovicell, the smaller interfascicular distance (less than 0.35 

 mm.), larger tubes, fascicles which do not border the zooecial margins, and short 

 claviform branches. 



The zone of growth is short and thick. 



The oeciostome is turned from the side of the dorsal contrary to the direction 

 observed in the Tervia irregularis group where the oeciostome is turned from t lie- 

 side of the cellular face. 



