Orange County, N. Y. 215 



"While the greater number of these species are characteristic 

 of the formation at other localities, several are new to the for- 

 mation, others entirely new species, and some present other re- 

 markable features worthy of description ; such will now receive 

 notice. 



4. Cladopora seriata H. A fragment of this Niagara species 

 was recognized. 



9. Pholidops. Represented by many casts and impressions, 

 probably of two species, differing in several respects from the 

 forms now known. They have been sent to Professor Hall for 

 description. 



10. Orthis oblata H. Casts and impressions of this species 

 were very abundant, often finely preserved ; considerable variety 

 of form is presented and every stage of growth. 



13. 0. .multistriata H. Four ventral casts were found prob- 

 ably of this species ; two were of very young individuals, the 

 others finely developed. They differ from those figured and de- 

 scribed in Pal. of N. Y., vol. iii, by the entire absence of a sinus in 

 their fronts which present a slight undefined elevation. The 

 beaks are enormous, one cast 40X30 mm has an obtuse beak 

 17 mm in height and 9 mm wide at its base, which is distant 12 mm 

 from the front; it is deeply lobed and slightly incurved. The 

 other cast is 33X25 mm , the very obtuse beak 13 mm in height and 

 12 mm wide at its base which is distant I2 mm from the front. 



24. Spirifer maeropleurus Con. Every stage of growth and 

 variety of form is presented in the abundant casts of this 

 species ; nearly four-fifths of these were of ventral valves. Some 

 individuals were very large, casts 70X60 mm are common. I 

 found one 90 mm wide and 40 mm long, but it is somewhat dis- 

 torted. Many magnificent specimens were observed. 



25. S. arrectus H. This Oriskany species was represented by 

 a ventral cast found in the eastern side of the anticlinal and there 

 associated with many of the above noted species. 



28. S. pyxidatus H. Another Oriskany species, of which a 

 dorsal cast and ventral impression were found. 



27. Spiriferina perlamellosus H. Very abundantly repre- 

 sented by casts and impressions often of very large size. 



32. Eatonia medialis Vanux. Several very complete casts 

 of individuals of large size were found, one 40x32 mra . 



36. Meristella (arcuataf) H. This species is comparatively 

 abundantly represented by ventral casts presenting considerable 

 variety of form and generally very transverse ; one found is 50 mm 

 wide and 35 mm long. The beaks are greatly incurved. 



38. Platyceras platystomum H. Several varieties of this form 

 were found, one very similar to fig. 1, plate 61, of vol. iii, Pal. of 

 N. Y. 



39. Leperditia. A small species differing from any now 

 known and represented by numerous casts and impressions about 

 2'5 mm Xl-5 mm . They have been sent to Professor Hall for de- 

 scription. 



