XORTH AMERICAN EARLY TERTIARY BRYOZOA. 719 



DESMEPLAGIOECIA DICHOTOMA, new species. 



Plate 125, figs. JKL1. 



Description. The zoarium incrusts shells upon which it forms claviform, 

 dichotomously branched lobes. The fascicles are crowded and arranged alternately 

 on each side of the zooecial axis; they are formed of three to six zooecia. The 

 tubes are short, distinct, little convex; the peristome is thin. The ovicell is con- 

 vex, short, transverse; it interrupts five fascicles. The protoecium is very small 

 in rapport with the ancestrula. 



Width of the fascicles 0.12 mm. 



Separation of the fascicles 0.16 mm. 



Measurements. 



Width of the branches . 1.2-2.5 



mm. 



Occurrence. Upper Jacksonian (Ocala limestone) : Old Factory about 1| 

 miles above Bainbridge, Georgia (rare). 

 Coiypes.C&t. No. 65311, U.S.N.M. 



DESMEPLAGIOECIA COMPRESSA, new species. 



Plate 125, figs. 16-19. 



Description. The zoarium has the Rcticulipora form of growth with com- 

 pressed fronds. The fascicles are incomplete, irregular, perpendicular to the zone 

 of growth. The tubes are distinct, little convex. The peristome is orbicular, thin, 

 salient. The zone of growth is very broad. 



Variations. According to fragments observed, the ovicell appears to be that 

 of Desmeplagioecia; but this must be confirmed. 



The fascicles are very irregular in length; they are often even replaced by 

 cellular rows, in which the peristomes are not adjacent. 



The Reticulipora form appears to develop chiefly in very calcareous waters. 



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

 Marianna, Jackson County, Florida (rare). 



Cotypcs.Cnt. No. 65315, U.S.N.M. 



DESMEPLAGIOECIA LOBATA, new species. 

 Plate 126, figs. 4-7. 



Description. The zoarium is free, bilamellar, composed of lobes which are 

 rounded, irregular, undulated, ramified. The fascicles are very short, formed of 

 four or five tubes, scarcely salient, arranged on each side of the axis of folding 

 or undulation of the lobes. The tubes are indistinct, isolated at the center and 

 scattered on the margins. The zone of growth is thick and rather wide. 



It is at hazard that we classify this species in the genus Desmeplagioecia as 

 we possess only two nonovicellcd specimens. 



Occurrence. Middle Jacksonian: Eutaw Springs, South Carolina (rare). 



Cotypes.G&t. No. 65317, U.S.N.M. 



