26 NEW YORK STATE MUSEUM 



Homalonotus sp ? 

 We have previously recorded the presence of this genus as repre- 

 sented by a few patches and fragments of the test. Their specific 

 characters can not be made out. The genus, however, is to be expected 

 from the fauna, as it is represented by a species of commanding pro- 

 portions, H. m a j o r Whitfield, from the same horizon, near Marbletown, 

 Ulster county. 



CIRRIPEDS 



Plumulites sp. 

 A single plate shows the presence in the fauna of this genus of 

 cirriped crustaceans. 



ANNELIDS 



Conodonts 

 Annelid teeth of this character have been observed but not in 

 suitable condition for identification. 



Autodetus beecheri Clarke 



Plate 2, flg. 27-32 



1892. Autodetus sp. nov., Clarke, op. cit. p. 411 



1894. Autodetus beecheri Clarke, Amer. geol. 13:334, fig. 7-19 



This species is quite abundant, and young shells showing the pri- 

 mary revolutions of the whorls are commonly found attached to the 

 surfaces of brachiopods and spreading bryozoa. There is some varia- 

 tion in the aspect of the body at maturity, and though the form 

 is generally a truncated obcone, sometimes there is little difference 

 in the diameter of the basal cicatrix and that of the final whorl. 

 Generally, too, the surface, rough and wrinkled, conceals all trace of the 

 sutures, but at times these are clearly shown by the annulated exterior 

 of the shell. 



Spirorbis assimilis, sp. nov. 



Plate 2, flg. 33-34 



1892. Spirorbis sp. Clarke, op. cit. p. 411 



Tube small, regularly coiled, not free on final whorl, all coils attached 

 and by their sinistral surface. Inner whorls nearly concealed; number 



