Report of the State Geologist, 351 



the limerock." ( ()}>. eft., ]>. 89, pL 4, tig. \-\.) The description ;in<l 

 figures represent a true coral, which, if correct, <1<> Dot apply to any of 

 the known species from the Trenton limestone. 



1 1 misBing. 



"12 Astrea stylophora " Michelinia stylopora Eaton (sp.). Ham- 

 ilton group. 



Original description: 



u A. stylopora (star stone). Hemispherical; little stars angle-tubu- 

 lar, approximating and contiguous, margin glabrous, lamella- distant; 

 the center of the column or star extended a little. Common on the 

 south bank of Lake Erie; about one inch iu diameter." (0j>. cit., p. 

 40, pi. 4, fig. 48.) 



"13 Columnaria sulcata "= Columnaria alveolata (Goldfuss), Hall, 

 Black River limestone. 



Original description: 



" C. sulcata (furrowed corals) tubes generally parallel and straight, 

 sometimes a little curved; furrowed longitudinally and substriate; 

 lamellae of the stars radiating from the center, and the marginal ones 

 alternating. Very abundant in transition limerock at Glens Falls, 

 where it is generally dark brown. We find some there whose prismatic 

 columns are six inches long." ( Op. cit., p. 41, pi. 5, fig. 51.) 



"14 Columnaria alveolata " = Favosites Helderbergice, Hall, Lower 

 Helderberg (Shaly limestone). 



Tins is apparently Prof. Eaton's identification of Goldfuss' species. 



His description is: 



" C alveolata (coral cakes). Hemispherical (often concave, convex 

 and sometimes fiat) tubes unequal in length, striated longitudinally, 

 and radiating from the base; those lamellae of the little stars are rat^tr 

 remote which radiate from the center, the marginal ones alternating. 

 Very abundant over the Coral cone on the Helderberg. They are 

 from three inches in diameter to ten." ( Op. cit., p. 40, pi. 4, figs. 

 44, 45.) 



"15 Sarcinula macrophthalma, var. prismatica." Label only. 



16, 17, 18, 19 missing. 



"20 Terebratula Perovalis." Label only. 



21 missing. 



" 22 Terebratula spiriferoides, Nobis " '= Athyris spiriferoides, Eaton 

 (sp.). Hamilton group. (Op. cit., p. 46.) 



"23 Terebratula dimidiata " (Pentamerella arata, Hall). Cornifer- 

 ous limestone. 



" 24 Spirifer alternatus." Label only. 



