P. E. Raymond — Fauna of the Chazy Limestone. 379 



The surface is usually smooth. Some casts show traces of 

 lines parallel to the margin of the outer lip. These lines run 

 a little forward from the suture, continuing in this direction 

 over the bulge of the whorl, then curve a little backward and 

 finally forward again at the lower end. 



Locality.— Rather common at Crown Point, Valcour, Val- 

 cour Island, Plattsburg, and Chazy, New York. The type is 

 in the writer's collection. 



Holopea scrutator sp. nov. 



Shell of medium size, about 3 whorls, the body whorl con- 

 stituting by far the larger part of the shell. Spire depressed, 

 sutures not deep. Aperture elongate, oval, entire. Umbilicus 

 small. 



The specimens usually occur as casts, but on a few the shell 

 is preserved. It shows no markings except a few growth 

 lines, which run diagonally back across the whorl. When the 

 specimens are exfoliated the suture lines are much more deeply 

 impressed and the spire appears higher. 



This shell is easily distinguished from the preceding by the 

 low spire, the shallowness of the sutures and the general 

 depressed form of the shell. 



Locality. — Common at Valcour Island and Chazy, New 

 York. The type is in the Yale Collection. 



Conidaria triangxdata sp. nov. 



Shell small, slender, slightly curved, 6-sided, but 3 of the 

 sides are so narrow as to give the shell an almost triangular 

 cross section. The narrow faces alternate with the wide ones, 

 the former truncating the angles which the latter would make 

 if prolonged till they met. Along each of the faces, both 

 wide and narrow, is an elevated line, which extends longitudi- 

 nally along the center of the face. The surface markings 

 consist of numerous fine tranverse strise, which bend backward 

 on crossing the raised line. 



The best specimen in the writer's collection is broken at the. 

 tip and at the aperture, yet is 38 mtn long. The original length 

 was at least 8 mm more. At the largest end the 3 wide faces 

 are each 7 mm wide and the narrow faces are each l*5 mm wide. 

 At the small end the wide faces are 2*5 mni wide and the narrow 

 faces are reduced to practically nothing, thus showing that in 

 young stages the shell was really triangular. 



Locality. — The type specimen, which is in the writer's col- 

 lection, was found in the upper part of the Chazy, on the 

 southeast point of Valcour Island (Cystid Point). It also 

 occurs near Smuggler's Bay, in layers a little lower in the 

 formation. 



