NEW YORK STATE MUSEUM 



p. 234) for the whole suborder Ophio-encrinasteriae. Gregory, 

 however, states that the true Taeniaster is asteroid in oral arma- 

 ture, in its alternately arranged ambulacral ossicles and in the 

 absence of a disk. 



Stiirtz, ibidem, points out that Taeniaster and Bundenbachia 

 exhibit a flexibility of the arms vertically to the disk which is 

 among recent ophiurans found only in Ophiotholia. Our specimen 

 is also preserved in a lateral view showing the same peculiar position 

 of the arms. 



Paleschara ulrichi nov. 



Zoarium incrusting or parasitic mostly upon cephalopod shells, 

 covering the entire surface, consisting of relatively large oblong 



polygonal (mostly irregularly pentag- 

 onal or hexagonal) cells (9 to 12 in 

 space of 10 mm) with thin, low walls. 

 Doctor Ulrich informs me that this 

 species has larger and less regularly 

 arranged cells than are found in its 

 chronologically nearest relatives. Pal- 

 eschara occurs in the Helderbergian, 

 Niagaran, Richmondian and rarely in 

 the Eden. With this species its range 

 is extended downward to early Trenton. 

 Position and locality. Snake Hill 

 beds, Snake hill, N. Y. 



Remarks. This bryozoan forms a 

 network so delicate that it is just barely 

 visible with the naked eye. The cells 

 are all longer than wide and form a 

 continuous layer on the shell ; they radi- 

 ate from a number of starting points, 

 being apparently composed of different 

 confluent colonies. The corners of the 

 cells are mostly slightly thickened and 

 in some places elevated into distinct 

 tubercles. 



Spatiopora sp. 



The compressed cephalopod shells 

 in the Utica and Canajoharie shales 

 are very frequently covered by a parasitic bryozoan growth which 

 has in former papers been referred by the present writer to 



Fig. 29. Paleschara 

 ulrichi nov. 



Portion of zoarium, x 10. 



From Snake Hill beds at 

 Snake hill, Saratoga county, 

 N. Y. 



