720 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



DESMEPLAGIOECIA PLICATA, new species. 



Plate 125, figs. 12-15. 



Description. The zoarium is bilamellar, formed of folded, irregular, undu- 

 lated, flabellate or linear lobes. The fascicles are inconstant, irregular, little 

 salient, long, perpendicular to the zearial margins; the tubes are little distinct, 

 isolated on the axis of undulation of flabelliform branches. 



The zone of growth is wide and very fragile. 



Measurements. 



Diameter of the peristome 0.12-0. 14 mm. 



Separation of the fascicles 0.20 mm. 



Variations. This species is quite remarkable, but unfortunately we know 

 only a small number of specimens of which we have been unable to make a de- 

 tailed study. 



The species has the zoarial form of Retieulipora, but very irregular ; the lobes 

 are folded on themselves, but they are not elongated and linear. The flabelliform 

 specimen is unilamellar. 



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

 Lenuds Ferry, South Carolina (rare). 



Upper Jacksonian (Ocala lime-stone) : Nine miles north of Ocala, Florida 

 (very rare) ; Alachua, Florida (very rare). 



C'otypes.Cnt. Nos. 65313, 65314, U.S.N.M. 



DESMEPLAGIOECIA (ACTINOPORA) BREVIS, new species. 



Plate 126, figs, 1-3. 



Description. The zoarium is orbicular and incrusts oysters. The fascicles 

 are short, irregular, discontinuous, formed of three or four tubes, very salient, 

 quite close together, arranged radially. The tubes are invisible; the peristome 

 is thin, orbicular or quadrangular. The zone of growth is invisible, or much 



reduced. 



Diameter of the peristome 0.12 mm. 



Distance between the fascicles 0.09 mm. 



Diameter of the disks 0.70 mm. 



Affinities. This species differs from Desmeplagloecla tenuissima and D. tennis 

 Eeuss, 1869. in its greater peristomial diameter (0.12 and not 0.08 mm.) and in 

 the much smaller zone of growth. 



Occurrence. Upper Jacksonian (Ocala limestone) : Bed Bluff on Flint Eiver, 

 7 miles above Bainbridge, Georgia (rare) ; Old Factory about H miles above Bain- 

 bridge, Georgia (very rare). 



Cotypes.Czt. No. 65316, U.S.N.M. 



Measure men ts. 



