!!• PALEONTOLOGY OF NEW-YORK. 



Teutaculites eloiigatus ( n. s.)- 



Plate VI. Fig. 16 - 21, 



Body extremely elongated and very gradually tapering to the apex, wliich 

 is sometimes slightly curved ; marked by strong, sharp annulations, of 

 •which more than three occur in the space of the diameter of the tube. 

 Section cylindrical. Surface ornamented by fine close annulating strias. 

 Length from one to three inches. Annulations four or five in the space 

 of a quarter of an inch at the base of the larger specimens, and about 

 nine in the same space near the apex. 



This species presents little variation in character, though tlie^e are sometimes 

 thickened annulations, and the edges of others are often obtuse either originally or 

 from weathering. The strise are often very slightly undulating, and in many speci- 

 mens these marks are obscure towards the apex. Where the shell is exfoliated, the 

 surface is smooth, and presents the appearance of a series of reversed truncated 

 cones, or short cups, placed one within the other, having all the characters of 

 Comulites. 



Fig. 16. An individual of medium size. 



Fig. 17. An individual of about the same length as the preceding, slightly compressed 

 below, giving it an apparently greater breadth at the base. 



Fig. 18. A large individual having a length of three inches. 



Fig. 19. Enlargement of a portion, showing the striaj. 



Fig. 20. An individual from which the exterior shell has been exfoliated, showing smooth 

 annulations whose greatest diameter is near the upper edge. 



Fig. 21. A portion of the same enlarged, showing the appearance of the annulations ma- 

 gnified. 



On one side of the base of the larger specimen, fig. 18, the greater distance 

 between the annulations shows the interior structure with more elongate inter- 

 nodes. 



Geological position and locality. In the shaly limestone, and in the Uiipcr Penta- 

 merus limestone of the Lower Helderberg group : Helderberg mountains and 

 Schoharie. 



