430 



BULLETIN 106, UNITED STATES NATIONAL MUSEUM. 



On the young zooecia (fig. 14) the ovicell is more salient and the frontal avicu- 

 larium is farther removed from the apertura. Thus the variations of the pleuro- 

 cyst extraordinarily deform the primitive characters. 



Occurrence. Wilcoxian (Bashi formation): Woods Bluff, Alabama (rare). 



t'otypes.Czt. No. 63855, U.S.N.M. 



Genus ANARTHROPORA Smitt, 1867. 



1867. AiHirthroiJora SMITT, Kritisk fiirteckning iifver Skandinaviens Hafsbryozoer, Ofver- 

 sig't Kongl, Vetenskaps-Akaclemiens Forhamlinglar, vol. 24, Bihang, p. 7. 



"Zooecia with the oral extremity slightly produced and free, subtubular ; orifice 

 terminal, semicircular; an avicularian pore on the elevated portion of the cell in 

 front; special pore wanting." (After Hindis, 1880.) 



Genotype. Anarthropora (Lepralia) monodon Busk. 1860. 



Range. Latdorfian-Recent. 

 The anatomy was described by Jul- 

 lien in 1904. 



This genus, deprived of ovicell, 

 may perhaps be better classed in the 

 family Adeonidae. 



ANARTHROPOSA (?) VERRUCOSA. new specie x 



Plate 7. fig. 20. 



l'i xrr//>tion. The zoarium incrusts 

 liryozoa and shells. The zooecia are 

 elongated, distinct, fusiform; the 

 frontal is convex and rcrrucose. 

 The aperture is semilunar; the proxi- 

 mal border is somewhat concave; 

 the peristome is complete, salient, 

 garnished with some distal spines. 

 No ovicell. The avicularia are small, 

 them, one above the aperture and two 



D *200 



Fin. 12S. Genus Anarthropora Smitt, 1867. 

 A-D. Anarthropora monodon Busk, ISfiO. A 

 Zooecia, X 30. (After Hincks, 1880.) B. Operculum. 

 C. Section of tentacle, seen in profile, greatly magni- 

 fied. (B, C after Jullien, 1903.) D. Stellate pores of 

 the frontal, X 200. (After Levinsen, 1909.) 



salient, simple, orbicular; there are three of 

 lateral ones. 



JAa=0.06-Q.07 



M< iixiii't in/ nt-x, Aperture \, 



Lto=0.06mm. 



mm. 



3=0.35-0.40 mm. 

 , - __ nnn 

 fc= 0.25-0.30 mm. 



iitirs. The stellate pores which ornament the frontal of Anarthropora 

 monodon Busk, 1860, are only visible on the young zooecia. On our specimens we 

 have never observed them ; we are not even very certain that the verrucosities ob- 

 served are hollow. Nevertheless the very special arrangement of the avicularia 

 obliges us to classify our specimens in Anartkropora. 



Occurrence. Midwayan (Clayton limc.-tonc) : One mile west of Fort Gaines, 

 Georgia (rare) : Luverne, Crenshaw County. Alabama (very rare). 



IJo7otype.C&t. No. 63825, U.S.N.M. 



