Ig PALiEONTOLOGY OE NEW-YORK. 



24. 1. CHiETETES { Species undetermined) . 



Pl. IV. Figs. 7 a, b, c, d. 



Small rolled masses, in the shape of acorns or eggs, arc common among the crinoida! 

 plates in the Encrinal limestone at Chazy. 

 Figs. 7 a, b, c. The specimens considerably magnified. Fig. 7 d. The ends of the tubes magnified. 



25. 1. ACTINOCRINUS TENUIRADIATUS (n. .fyj.). 



Pl. IV. Figs. 8 & 9. 



Plates depressed -conical, somewhat irregularly hexagonal in form; margins deeply 

 crenated ; surface marked by elevated sharp ridges, which meet at the sutures ; rays or 

 ridges in about six fascicles, which are from three to five times divided before reaching the 

 margin ; indentations of the rays producing the crenulations ; lower surface of the plates 

 flat, presenting a deeply notched margin. 



The plates of this species, which appears to be new, are ver}^ aliundant in the Crinoidal 

 limestone of Chazy : they have evidently been macerated for a long lime in water before 

 being imbedded. Associated with these plates are a great number of fragments of encrinal 

 columns ; and from the thickness and extent of the mass, which shows a large number of 

 the plates, it is evident that, at one period, this was a favorite habitation of the crinoidea. 

 The disturbance attending their destruction has so comminuted their remains, that no perfect 

 specimens can be obtained. 



In form of plates, and mode of sculpture, this species somewhat resembles Cyathocrinus 

 geometricus of Goldfuss, as figured by Phillips {Palceozoic Fossils, p. 135, pl. 60, fig. 41) . 



{State Collection.) 



26, 2. ACTINOCRINUS? { Species undetermined) . 



Pl. IV. Fig. 10. 



A single plate only (perhaps belonging to this genus) has been found. Form octagonal, 

 somewhat irregular, smooth or granulated (from weathering"?) . 



Position and locality. This specimen was found at the base of tlie limestone, and im- 

 mediately at its junction with the Calciferous sandstone, about one mile west of Chazy 

 village. 



27. 1. ASTERIAS? {Species undetermined) . 



Pl. IV. Figs. 11 a,b. 



This specimen presents precisely the form and appearance of the madreporiform tubercle 

 on the back of an listerias, scarcely differing from that of the recent species of our coast. 

 It is entirely separated from any other organic body in the stone, though associated with 

 large numbers of crinoidal fragments. 



Fig. 1 1 a. Natural size. Fig. 1 1 b. Magnified view. 



Position and locality. In the lower part of the limestone at Chazy. 



