On the Biloliie. 49 



very much altered, I have had ample proof by specimens from 

 several parts of our country. In the rocks of the Missouri, ma- 

 ny specimens of a species of Terebratulite, common there, may 

 be found in some instances depressed, and in others compressed 

 to various degrees of flatness ; they occur, indeed, in almost 

 every irregular shape. The zigzag line is evidently the line 

 of junction of the valve. This line may be traced round the 

 ends of the specimen, to the termination of the elongated hinge 

 margin, the separating line of which is, as it ought to be, rectili- 

 near ; the concentric and other lines on the under surface may 

 with some difficulty be traced to their proper situation in this 

 genus ; the umbones, or rather the apex of the shell is concealed 

 by the remains of the matrix." 



Among so many conflicting opinions, it is hoped that zoolo- 

 gists will turn their attention to this interesting subject. A 

 farther investigation of these organic remains, aided by more 

 complete specimens, will, it is hoped, enable naturalists to de- 

 velope more completely their structure, and assign their proper 

 place in the kingdom of nature. 



Description of a new species of Fish, from the Hudson River. 

 By De Witt Clinton, LL. D. Read Sept. 29th, 1823. 



Sub genus Clupea. Cuvier. 



The maxillaries arcuated anteriorly, divided longitudi- 

 nally into many pieces ; opening of the mouth moderate, not 

 wholly furnished with teeth, often toothless ; the dorsal above 

 The ventrals. 



Clupea hudsonia.* 



PI. II. fig. 2. 

 With a broad satin stripe extending from the gill covers to 

 the tail, and a dark rounded spot at the base of the tail. 



