16 PAUEONTM-OOY OF NKW-TORK. 



20. 1. GORGONIA'? ASPERA (n. 5p.)- 

 Pi. IV. Figs, a a, 3 b. 



A fragment of a Icaflikc expansion, consisting of an open network ; fenestrules angularly 

 oval, distinct ; longitudinal ribs direct, undulating, united by smaller transverse bars ; 

 surface of the ribs and bars marked by elevated dots or points, which, on the longitudinal 

 ribs, gradually produce an elongation or elevated line, dying out just above the next lower 

 point, thus giving a kind of interruptedly striate or echinulate appearance to the surface. 



This beautiful little fragment is peculiarly well marked, and need not be confounded 

 with any other. The surface bears some resemblance to Retepora echinulata ( Blainville, 

 Man. D^Actinologie, p. 433 ; Michelin, Icon, zoophytologique, pag. 72, pi. 14, fig. 11). 



Fig. 3 a. Natural size of specimen. 



Fig. 3 b. Portion enlarged, showing the rough surface of the coral, and the form of the fenestrules. 



Position and locality. Near the lower part of the Chazy limestone, associated with 

 crinoidol columns, etc., at Chazy, Clinton county. 



21. 1. STICTOPORA* FENESTRATA ( n. sp.). 



Pl. rV. Figs. 4 a, b, c, d, e. 



A stony expanded branching coral ; branches flattened, obtuse at the extremities ; surface 

 on both sides covered by a celluliferous crust ; cellules in perpendicular rows, separated 

 by elevated ridges and crossbars, oval or roundish, more elongated as they become worn, 

 alternating and apparently increasing in semicircular transverse rows ; internal crust marked 

 by concentric lines in the direction of the lines of cellules, £is seen in fig. 4 e. 



This species is perhaps identical with one found in the Birdseye limestone, but diflers in 

 essential characters from the Trenton limestone species. Specimens more or less worn 

 present dififerent aspects, and may be mistaken for diflferent species ; and I have been in- 

 clined to regard the specimens A ab and 4 c d as distinct, but further comparison and 

 examination induces me to consider them identical. 



Fig. 4 a. Natural size of the branches of this coral. 



Fig. 4 i. A portion magnified. 



Fig. 4 e. A fragment of another specimen from a different locality. 



Fig. 4 d. Portion of the same magnified. 



Fig. 4 «. A part of the axis of a specimen, denuded of the outer crust, and presenting a series of 

 concentric lines, corresponding with the lines of progressive growth. 



Position and locality. This fossil occurs towards the lower part of the Chazy limestone, 

 associated with crinoidal joints, Leptcma, and other fossils of (he rock ; the preceding coreJa 

 are also met with in the same as'-ociation. It is found at Chazy, Clinton county, and also 

 near Galway, Saratoga county. Instate Collection.) 



' For generic description, see description of species under Trenton limestone. 



