No. 89.] 



63 



Fig. 2. 



THAMNOaRAPTUS TYPUS. 



THAMNOGRAPTUS CAPILLARIS ( n. s.). 



Stipe extremely slender, flexuose or slightly divergent at the junction of the 

 branches : branches diverging nearly at right angles to the stipe, capillary; 

 branchlets less divergent. Surface of stipe and branches marked by numerous 

 indentations, which may indicate the place of cellules.'* Substance of the stipe, 

 branches and branchlets, nearly cylindrical. 



This species is an extremely slender form; the stipe, as 

 preserved, being capillary, and the branches and branch- 

 lets still finer. It is not improbable that what appears in 

 the fragment as the main stipe is a branch of a larger one, 

 but its form and mode of branching preclude its identity 

 with the preceding species. 



The figure is from a fragment of this species, twice 

 enlarged. 



Geological position and locality. In the shales of the 

 Hudson-river group : Near Albany. 



ThAMNOGBAPTUS CAPILLARIS. 



