818 BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



LICHENOPORA VERRUCOSA Philippi, 1843. 

 Plate 131, figs. 10-13, and plate 130, figs. 12, 13. 



1843. Ceriopora verrucosa PHILIPPI, Beitrage zur Kenntuiss der Tertiarversteinerungen 



des nordwestlichen Deutschlands, p. 67, pi. 1, fig. 12. 

 1S64. Heteroporella verrucosa RETJSS, Zur Fauna des deutschen oberoligoeans, Sitzungs- 



berichte der k. Academic rter Wissenschaften, Wien, vol. 50, pt. 2, p. 68. pi. 7, 



figs. 1, 2. 

 1865. Heteroporella verrucosa RETJSS, Die bryozoen des deutschen Septarienthones, 



Denkschriften der k. Akademie der Wissenschaften, Wien, vol. 25, p. 201 (sec. 85). 

 1869. Heteroporella, verrucosa REUSS, Zur Fossilen der Oligociinschichten von Gaas, 



Sitzungsberiehte der k. Akademie der Wissenschaften, vol. 59, p. 34. 

 1SS4. Heteroporella verrucosa SCHREIBER, Beitrage zur Fauna des mitteloligocanen 



Grunsandes aus dem Untergrunde Magdeburgs, vol. 2, p. 11, pi. 2, fig. 16. 



Description. The zoarium is simple or composite. When it is simple it is 

 discoidal, very convex ; the lower face is convex, pedunculate and the basal lamella 

 is striated concentrically. The central area is large and is occupied by the ovicell. 

 The fascicles are salient bi- or tri-serial, not continued as far as the zoarial border. 

 The shorter ones are the more exterior. The tubes are polygonal and smaller than 

 the cancelli. They have no visor. The cancelli are larger in the central area and 

 smaller between the fascicles. The spinules are quite long, scattered, and very 

 fragile. The ovicell is placed under the central area. 



Width of the fascicles 0.20 mm. 



Diameter of the central cancelli 0.16 mm. 



Zoarial diameter 6.00 mm. 



Diameter of the interfascicular cancelli 0.12 mm. 



Diameter of the tube 0.10-0.12 mm. 



Affinities. The zoaria observed are simple and discoidal ; sometimes they are 

 superposed (as in Domopora). 



This species much resembles Lichenopora defranciana Michelin, 1848, of the 

 Paris Lutetian. It differs from it in its zoarium, which is not supported by a 

 large peduncle and not turbinate, and in its convex and hollow lower face. 



The comparison with German Oligocene fossils is always a little doubtful, 

 these fossils neVer having been distributed to the principal museums of the world. 

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

 Lenuds Ferry, South Carolina (rare). 



Geologic distribution. Middle and Upper Oligocene of Germany (Eeuss) ; 

 Stampian of Gaas in France (Keuss). 



Plesiotypes.Cnt. Nos. 65363, 65454, U.S.N.M. 



LICHENOPORA GRIGNONENSIS Milne-Edwards, 1838_ 



Plate 129, figs. 1-11. 



1823. Licttenopora crispa DEFRANCE, Dictionnaire des Sciences naturalles, vol. 26, p. 257. 

 1838. Ttiltilipora grignonensis MILNE-EDWARDS, Meinoire sur les Tubulipores, Annales des 



Sciences naturalles, Paris, vol. 9, p. 13, pi. 13, fig. 2. 

 1845. Tubulipora grignonensis MICHELIN, Iconographie Zoophytologique, Paris, p. 169, 



pi. 46, fig. 7. 



Measurements. 



