REPORT OF THE STATE PALEONTOLOGIST I9O3 235 



Discussion of individual species 



HYDROZOA 



Stromatopora concentrica? Goldfuss 

 The organism referred to this species is very abundant in the 



Pavosites bed. 



ACTINOZOA 



Blothrophyllum promissum? Hall 



Several specimens of a coral very similar to this species were 

 noticed in the Onondaga formation along the Newburg turnpike. 

 It was impossible to get any free from the matrix, but the sections 

 which could be observed had all the appearances of this species. 



Enterolasma (Streptelasma) strictum (Hall) 



This simple coral is very abundant and always well preserved, 



specially in the Coeymans and New Scotland. It is found less 



abundantly in the Becraft and Port Ewen. A specimen of average 



size measures about 15mm in length by 6mm in width at the large 



end. 



Zaphrentis roemeri Edwards & Haime 



A specimen from the Pavosites bed has a greatest diameter of 



38mm. It has about 80 septa, most of those in the section reaching 



over half way to the center. There are a few shorter ones but no 



regular alternation of longer and shorter ones was observable. No 



entire specimens were procured so that the length is not known. 



This was observed only in the Pavosites bed where it was quite 



abundant. 



Favosites helderbergiae Hall 



The very common coral of the lowest Coeymans, where it 

 occurs in great abundance. It is found rarely in the upper 

 Manlius. The fact that it is present in the greatest abund- 

 ance in the coarsely crystalline beds seems to indicate that 

 it is a reef species. A specimen from the base of the Coey- 

 mans shows as greatest diameter of corallites 1.5mm, the average 

 width being 1.3mm. One section gave 10 tabulae in 7.5mm, 

 another 12 in 9.5mm, averaging i tabula to imm. A specimen from 



