Measurements. 



790 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



It differs from Tervia bicdternata Gregory, 1892, and from Tervia filiformis 

 D'Orbigny, 1852, in its large micrometric measurements. 



Occurrence. Middle Jacksoriian : Wilmington, North Carolina (very com- 

 mon) ; near Lenuds Ferry, South Carolina (very common). 



Upper Jacksonian (Ocala limestone) : Wast bank Sepulga Eiver Escambia 

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



Cotypes.Czt .No. 65.434, U.S.N.M. 



TERVIA PARVULA, new species. 



Plate 147, figs. 12-14. 



Description. The zoarium is formed of small compressed branches. The tubes 

 are distinct, separated by a salient thread, arranged in quincunx or in irregular 

 rows; the peristome is thin, small, orbicular, salient. On the dorsal the tubes are 

 separated by a salient thread and superposed in lozenge-shaped areas. 



Diameter of the peristome 0.10 mm. 



Distance between the peristomes 0.30 mm. 



Width of the branches 0.40 mm. 



Affinities. This species differs from Tervia gracilis in its smaller micrometric 

 dimensions. The few specimens collected bear no ovicells. 



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

 Marianna, Jackson County, Florida (rare). 

 Cotypes.Cnt. No. 65435, U.S.N.M. 



TERVIA TUMIDA Smitt. 1871. 



Plate 140, figs. 14-21. 



1871. Tubulipora (Idmonea) tumida SMITT, Krit.iske forteckning ofer Skandinaviens 

 Hafsbryozoer, Ofversigt af Kougl. Vetenskaps-Akaclemiens Forhandlingar, vol. 28, 

 p. 1116, pi. 20, figs. 5, 6, 7. 



1903. Idmonen tumida WATEBS, Bryozoa from Franz-Joseph Land, Journal Linnean So- 

 ciety, London, vol. 29, p. 168, pi. 21, figs. 4, 5. 



Description. The zoarium, is free, linear, bifurcated, provided with radicells 

 at the bifurcations, with subcircular transverse section. The fascicles are salient, 

 quite far apart from each other and also from the median line, alternately arranged 

 and extending beyond the zoarial margins; they are formed of three or four 

 equal zooecia. The tubes are visible, flat, separated by a salient thread. The 

 dorsal lamella is very convex and striated longitudinally by the tubes. The 

 ovicell is globular, elliptical, very salient; the oeciostome is small, transverse, 

 placed near the dorsal of the zoarium. 



Diameter of the tubes 0.10 mm. 



Distance between the fascicles 0.550.80 mm. 



Width of the fascicles__. 0.10 mm. 



Width of the zoarium! 0.70 mm. 



