TRENTON LIMESTONE. 79 



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Genus ST ELL IP OR A. ./ 



[ Greek, (treKKa, a star, and iropa, pore.] 



Character. Coral consisting of a thick expanding crust, apparently attached to some other 

 marine body ; surface with numerous star-shaped prominent elevations ; stars composed of ' 



4 to 9 strong elevated rays, the upper edges of which present numerous elevated points or 

 pores.  * 



This peculiar coral approaches nearer to the Anthelia, than to any other genus re- 

 presented in works within my reach. The stars have not the distinct circular centre re- 

 presented in the figure of M. de Blainville, but in other respects they correspond very 

 nearly. 



120. 1. STELLIPORA ANTHELOIDEA. 



Pl. XXVI. Figs. 10 a, b, c. 



The specimen, which is a fragment only of a larger thick crustaceous expansion, presents f 



upon its surface about ten perfect star-shaped elevations, with remains of several others 

 upon the fractured edges of the specimen. These stellated elevations are irregularly dis- 

 posed, and not of uniform size or number of rays ; the smaller having the fewer rays, and 

 appearing to be near the margin of the coral. The intermediate space is almost smooth, or 

 finely granulated. 



For this unique and very interesting specimen, I am indebted to Luke Wilder, Esq. of 

 Lowville, Lewis county, whose zeal and discrimination have enabled him to collect a very 

 fine cabinet of the fossils of the Trenton limestone. This coral is associated with fragments 

 of two or three species of Trilobiles, Orthis testudinaria, Chatetes, Sticiopora, and the last 

 noticed species of Retepora ? 



Fig. 10 a, represents the fragment, with the prominent star-form cells of the natural size. ^-^ 



Fig. 10 4. Three of these stars enlarged, showing points or pores upon their upper surface. One of these 



stars has a slightly irregular form in the centre, as if composed of parts of two : this is true 



of several others. 

 Position and locality. In the central part of the Trenton limestone. Lowville, Lewis 

 county. 



121. 1. GRAPTOLITES AMPLEXICAULE. 



Pl. XXVI. Figs. na,b. 

 Compare Graptolitet /oliaeeut. Portxock, Geol. Report of Londonderry, Tyrone, &c., pag. 320, pl. 19, fig. 9 a, b, c. 



Stipes slender, linear, elongated, surrounded by small sheathing folioles or scales, giving 

 it a serrated appearance ; folioles small, acute. 



