238 NEW YORK STATE MUSEUM 



widest portion. One specimen from the Favosites bed was noticed 

 incru sting a mass of Stromatopora and being in turn incrusted by it. 

 Very small specimens of what appear to be this species are quite 

 abundant in some of the Upper Manlius beds ; but owing to the 

 great density of the rock, only pieces too fragmentary to be identi- 

 fied were acquired. 



PELMATOZOA 



Edriocrinus pocilliformis Hall 

 Very abundant in the Becraft where alone it occurs. Only the 

 bases of this crinoid have been found preserved and the radial plates 

 could not be made out on them. Those from the shaly limestone are, 

 as a rule, smaller than those from the heavier beds. The former 

 average 6mm in the diameter of the summit of the base and 7mm in 

 length; the latter average 8mm by lomm. The larger species, 

 E. sacculus Hall, was not noticed in the higher Oriskany beds. 



BRYOZOA 



Lichenalia torta Hall 

 Very abrmdant, but the celluliferous tissue has usually been 

 removed, leaving only the surface of the epitheca. It was found 

 quite abundantly in the whole of the Helderbergian with the pos- 

 sible exception of the New Scotland. It also occurs in the Favo- 

 sites bed. 



lioclema cellulosum (Hall) 



Very abundant in the Coeymans and quite well preserved on the 

 weathered surfaces of the beds. 



L. ponderosum (Hall) 

 This bryozoan was found only in the lower New Scotland and 

 there not abundantly. 



Moiiotrypa tabulata Hall 



An elongaied, spheroidal corallum of this species from the Lower 

 New Scotland has an average of 20 corrugations on the outer sur- 

 face of the cell tubes in 5mm, with a diameter for the cell tubes of 

 about .4mm. 



Monotrypella ? abrupta (Hall) 



One specimen from the Lower New Scotland averages about 10 

 septa in imm beyond the abrupt outward turning of the tubes. 



I 



