CYCLOSTOMATOUS BRYOZOA CANU AND BASSLER 



45 



side and in quincunx on the other. This irregularity provokes an 

 equivalent irregularity in the sections. Those that we have made 

 show the same characters as in the preceding species, thus leaving 

 no doubt as to the generic placing. 



The species differs from Cardioecia faringdonensis in its smaller, 

 more crowded and less salient peristomes. 



Occurrence . — Lower Cretaceous (Aptian) : Faringdon, England 

 (rare) . 



Holotype.— Cat. No. 69898, U.S.N.M. 



Genus NEMATIFERA Canu and Bassler, 1922 



The ovicell is an elongated sack, subsymmetrical, irregular, scarcely 

 convex; the oeciostome is terminal, very small, hardly salient. All 

 of the tubes are bordered with sali- 

 ent threads exteriorily. The tubes 

 are short, cylindrical, polygonal; the 

 gemmation is triparietal on a basal 

 lamella. 



Genotype. — Nematifera (Elea) reti- 

 culata D'Orbigtiy, 1853. Lower Cre- 

 taceous (Neocomian, Urgonian). 

 The ovicells so far discovered are 

 little distinct but clearly diiferent 

 from those of Trigonoecia, although 

 the structure in sections in these two 

 genera is ver}' similar. The tubes 

 are bordered exteriorly by a salient 

 thread, which never occurs in Tri- 

 gonoecia. According to the exterior resemblances, this genus ought 

 to have Jurassic representatives. 



NEMATIFERA RETICULATA D'Orbigny, 1853 



Plate 4, figs. 1-4 



1853. Elea reticulata D'Orbigny, Pal^ontologie francaise, Terrain Cr6tac6, vol. 5, 

 p. 629, pi. 782, figs. 9-12. 



Measurements. — Diameter of orifice, 0.14 mm,; diameter of peri- 

 stomes, 0.24 mm. ; distance of peristomes, 0.60 mm. ; separation of 

 peristomes, 0.64 mm. 



Affinities. — This species is not at all a member of the Eleidae. 

 The peristome is orbicular, but, through weathering, it becomes 

 semielliptical. There are no facettes, but these are the walls of the 

 tubes themselves that are very short because of the close approach 

 of the peristomes. The tubes are almost always bordered with a 



Fig. 20.— Nematifera reticulata D'Orbigny, 

 1853. Longitudinal and transverse sections, 

 X 16. Lower Cretaceous (Valangian): Sainte 

 Croix, Switzerland 



