178 

 Genus REPTARIA. Rolle. 



[F>rY. : liepto. to creep.] 

 (18.")1 : Leonliai'd aud Broun, Neues Jahrbiieli, p. 180.) 



Brvozoniii creeping- and adher- 

 ing to foreio-n l)odie>s. A central 

 stem or rachis gives off lateral 

 tubes, and at irregular intervals, 

 branches. The tnbes are slightly 

 l^^il sinuous and nearly parallel with 

 the rachis below, but farther up 

 they divei'ge nioi-e and more. 



R E r T A R I A S T O L O X I F E 11 A . 



Rolle. (Fig. 7G.) (Pal. N. Y., 

 Yob VL. p. 274, PI. LXY.) 



Distinguishing Characters. — 

 Incrusting habit; equal lateral 

 tubes, of similar length; slight 

 annulations of tubes; last cell 

 terminal. 



Found in the Demissa bed. at 



Fig. -fi. Reptaria siolonifera. Frond SectioU 5, attached tO aU OrtllO- 

 incrusting Orthoceras, natui-al size ; 



and a portion enlarged, x 6 (after Hall (;'(;»i'fis ( OUC SpecimCn ). 

 and Simpson). ^ 



Genus HEDERELLA. Hall. 



[Ety. : Ildhra, ivy.] 

 (ISSl: Trans. Albany lust., Vol. X., p. 194.) 



"Zoarium parasitic, consisting of a filiform tubular axis, 

 with opposite or alternate lateral budding of simple tubular 

 cells ; also of lateral extensions, continuing in the same 

 manner of growth as the initial axis." 



Heuerella canadensis. (Nicholson.) (Fig. 77.) (Pal. 

 N. Y., Yol. YL, p. 277, PI. LXY.) 



Distinguishing Characters. — Sub-cylindi-ical cell tubes, 

 transverse section oval; tubes usually alternating; tubes 

 either, in contact with main axis, or diverging from it; 

 general prolific development of tubes. 



