696 



Report of the State Geologist. 



Heknodia, Hall. 

 (Rep. State Geologist, K Y., p. 58. 1884.) 

 Type, Hernodia humifusa^ Hall. 



(Plate 25, figs. 1, 2.) 

 Zoarium parasitic, procumbent, consisting of tubular, annulated 

 cells, enlarging to near the aperture ; increasing by lateral gem- 

 mation, the buds continuing growth in the same manner as the 

 parent tube so that comparatively large surfaces are often covered. 



Probosoina, Audouin. 

 (Desc. de I'Egypte ; Pol., p. 236. 1826.) 

 Zoarium adnate, branching dichotomously or inosculating, in 

 the latter case forming an irregular large meshed net-work. 



201 



Fig. 201. Proboscina'tumulosa, natural size and x9. 

 Lower fig, P.frondosa. Alfrond, xl8. 



Cell tubes as in Stomatopora, excepting that they are more or 

 less immersed and not uniserial, being arranged in two or more 

 contiguous rows. 



