232 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



The zoarium is more often multilamellar. The lamellae consists of zooecia 

 piled upon zooecia (figs. 11, 14). The outermost zooecia often experience some 

 reduction (fig. 13) or deformations (fig, 17). 



The small avicularia are interopesial. They appear almost circular in tan- 

 gential sections. These same sections also show the olocyst constitution of thf 

 zooecial wall (fig. 19). 



The inner face of the zoarium exhibits convex hexagonal zooecia bearing the 

 hydrostatic tuberosities. Many of these latter terminate in a small pore whose 

 function is unknown to us (fig. 20). 



Affinities. In Dacryonella minor the zoarium is bilamellar and free, and its 

 dimensions much smaller. The great persistence of Dacryonella octonaria may be 

 attributed to its perfected hydrostatic system. 



Occurrence. Middle Jacksonian: Wilmington, North Carolina (abundant); 

 Near Lenuds Ferry, South Carolina (common) ; Eutaw Springs, South Carolina 

 (rare) ; 3- miles north of Grovania, Georgia (rare) ; 18 miles west of Wrightsville, 

 Johnson County, Georgia (rare). 



Upper Jacksonian (Ocala limestone) : 7 miles above Bainbridge, Georgia (com- 

 mon) ; Old Factory, 1| miles above Bainbridge, Georgia (common) ; West bank 

 of Sepulga Eiver, Escambia County, Alabama (common) ; Chipola Eiver. east 

 of Marianna, Jackson County. Florida (rare) ; 9 miles north of Ocala. Florida 

 (rare) ; Alachua, Florida (rare). 



Jacksonian (Zeuglodon zone) : South side of Suck Creek, Clarke County. 

 Mississippi (rare). 



Cotypes.Cat. Nos. 62584, 63987-63990, U.S.N.M. 



DACRYONELLA MINOR, new species. 



Plate 36, figs. 7, 8. 



Description. The zoarium is free, bifurcated, and formed of two lamellae 

 placed back to back. The zooecia are small, elongated, indistinct, confluent; 

 the marginal rim is broad, flat, enlarged at the base into a concave cryptocyst. 

 The opesium is entire, subelliptical with a straight or convex proximal border; 

 the polypidian convexity is very inconstant. The ovicell is a very small distal 

 convexity. The avicularia are triangular and project but slightly. 



Measureinents.-Zooe^ 



Affinities. Although quite variable the polypidian convexity is actually pres- 

 ent as in Dacryonella octonaria., but the small dimensions and the free zoarium 

 distinguish the two species very well. 



Occurrence. Upper Jacksonian (Ocala limestone) : Chipola Eiver, east of 

 Marianna, Jackson County. Florida (common). 



Cotypes.Cat. No. 63986, U.S.N.M. 



