I ! I NEW YORK STATE MUSEUM 



Cladopora styphelia, sp. nov. 



Plate 9, flg. 1, 2 



There are found occasionally twigs of Cladopora of considerable 

 size, bearing very large oblique cells which are arranged more or less 

 irregularly in 8 to 10 vertical, alternating rows. These steins have a 

 diameter of 6 to 8 mm and the apertural diameter of the cells is from 

 •J to 4 nun. The species is readily recognized by the size of the cells and 

 their angular projection at their apertures, which gives the colony a 

 very rough exterior. 



Aulopora cf. schoharie Hall 



See Paleontology of New York. 6:3, pi. 2. tig. 1-6 



The few specimens of Aulopora observed are very closely allied 

 to this Helderbergnan species, but appear to be persistently of larger size. 



Monotrypella arbusculus Hall and Simpson 



1887. Chaetetes (Monolryptlla) arbusculus Hall and Simpson, Paleontology 

 of New York. 6:12, pi. 9, tig. 1-8 



Of this Helderbergian species a few very characteristic examples 

 have been observed. 



HYDROZOA 



Dictyonema cf. splendens Billings 



1874. Dictyonema splendens Billings, Oeol. sur. Canada; Paleozoic fossils. 

 v. 2, pt 1, 'p. 12, fig. 2, 2a 



Mr Billings described his species from the lowest of the (raspe 

 series of limestones (no. 1) which, according to his determinations, con- 

 tains a fauna with notable Helderbergian affiliations. This species does 

 not agree closely with the species known from the New Scotland lime- 

 stone (D. eras sum Girty), but is comparable to a form observed only 

 in some fragments from the calcareous Oriskany. 



