66 BULLETIN 96, UNITED STATES NATIONAL MUSEUM. 



ADEONELLA FOLLICULATA, new species. 



Plate 6. fig. 3. 



Description. — The zoarinm is bilamellar with two lamellae back 

 to back and separable; the fronds are lobed, very thin and fragile. 

 The zooecia are very long, distinct, separated by a furrow, little con- 

 vex, bordered with numerous parietal areolae (10-12 pairs). The 

 peristomie is short, somewhat projecting exteriorly and is perforated 

 by a spiramen; the peristomice is semilunar with a convex lower 

 lip; the aperture (interior) presents a proximal concave border. 

 The gonoecia are larger (0,30mm.) than the other zooecia; their ex- 

 ternal aperture is greater (la=0.10mm.) and the spiramen is more 

 removed from the aperture. There is a very small, simple avicul- 

 arium on the peristomie. 



^ , , . fZs=: 0.65-0.75 mm. 



Measurements. — Lateral zooecia ,_^ ^^_^ ^„ ^^^^ 



, . , . (Z3=0.50mm. 



Axial zooecia{, „ ^^ 



[7.2=0.20 mm. 



^ . fZs=0.50mm. 



Gonoecia, „ „^ 



[?0=O.3Omm. 



_ . ^ . „ . fA/^=0.04mm. 



Peristomice ot zooecia / „ ^- 



^ . . ^ . [A;?=0.04mm. 



Peristomice ot ©oi^ceciaj^^^Q .j^^^^^^ 



Occw^ence.—WiMlQ Jacksonian (Castle Hayne beds) : Wilming- 

 ton, North Carolina (common). 

 Type.— C2it. No. 62G08, U.S.N.M. 



Genus ADEONELLOPSIS MacGillivray, 1886. 

 1886. Adeoncllopis MacGilli\ray, Description of New Polyzoa. pt. 9, 

 Transactions Royal Society Victoria, p. 7. 



The zooecia provided in the central line with one or several 

 ascopores. (Levinsen.) 



The ascopores are grouped at the base of a cribriform area. Inter- 

 zooecial avicularia and gonoecia are present. 



Genotype.— Adeonellopsis foliacea MacGillivray, 1886. 



Range. — Wilcoxian-Eecent. 



Seven new species ranging from the Wilcoxian to the Vicksburgian 

 have been determined in the Eocene of the United States. 



PHYLACTELLIDAE, new family. 



The ovicell is recumbent ; its orifice is very large and closed by a 

 special operculum. " The larvae are large and are more fully devel- 

 oped within the ovicell than is usual ; the corona and cilia are very 

 distinct." 



