66 PALEONTOLOGY OF NEW YORK. 



Fenestella adornata, n. sp. 



PLATE XXII, KIGS. 7, 8. 

 Fenestella, sp. t Hall. Report of SUte Geologrist for 1882. Expl. pi. 22, flgs. 7, 8. 1883. 



Bryozodm infundibuliform. Branches moderately strong, gently rounded ; very 

 grmlually and regularly increasing in size to the bifurcations, which are infre- 

 quent ; marked by from two to three prominent, granulose striations. Width 

 of interstices from one-half to two-thirds that of the branches. Dissepi- 

 ments strong, width .40 mm., six in the space of 5 mm. Fenestrules regu- 

 larly oval. 



On the celluliferous face the branches are angular. The interstices appear 

 narrower than on the opposite face. Dissepiments rounded, much depressed 

 below the plane of the branches. Cell apertures small, circular ; twenty in 

 the space of 5 mm., disposed in two ranges, opening somewhat laterally : 

 margins distinctly and equally elevated. Ranges of apertures separated by 

 a narrow, slightly elevated carina. 



Formation and locality. Lower Helderberg group, near Clarksville, N. Y. 

 ICHTHYORACHIS, McCoy. 1844. 



ICHTHYORACHIS NeREIS. 



PLATE XXII, FIGS. 19-21. 



IchOiyorachla NereU, Hall. Twenty-sixth Rept. N. Y. State Mus. Nat. Hist., p. 98. 1874. 

 " " " Thirty-second Rept. N. Y. Stete Mus. Nat. Hist., p 174. 1879. 



" " Report of SUte Geologist for 1882. Expl. pi. 22, figs. 19-21. 1883. 



ZoARiOM plumose ; midrib longitudinally striated, flattened on the non-celluliferous 

 face and marked by a groove along the center. Lateral branches or pinnules 

 slender, distant from each other about the width of the midrib. There are 

 two rows of apertures on the pinnules and three or more on the midrib. 

 The largest fragment observed has a length of 17 mm. ; width of midrib 

 .50 mm. ; width of pinnules about .25 mm. 



The specimens are poorly preserved, and the characters of the cell aper- 

 tures are indistinctly shown. 



