96 



ON THE MINERALOGY OF THE 



Multilocular Univalves. 



1. Nautilus. — One species only of this restrict- 

 ed genus was observed, of an oval form, the parti- 

 tions distant and slightly waved. 



2. Ellipsolithus, — A genus instituted by 

 Sowerby, contains two species from this quarter. 

 E. funatus, Sowerby, tab. 32.. and E. ovatus, 

 Sowerby, tab. 37. This species is subject to con- 

 siderable variation in shape and markings. 



In my specimens, the partitions are obvious, al- 

 though they could not be detected in those which 

 Mr Sowerby possesses. 



3. Orthocera. — Two species occurred in this 

 district. The first resembles the O. striata of Sow- 

 erby, tab. 58. In the specimen he describes, the 

 striae are longitudinal ; in the one now before me, 

 they are transverse, and the pipe somewhat lateral. 

 The characters of the other species are nearly obli- 

 terated. 



4. Amplexus. — This is a new genus instituted 

 by Sowerby, for the reception of the A. cor allot- 

 des, tab. 72., a shell from this district, and one of 

 a very peculiar character. At first sight, it may 

 readily be mistaken for one of those corals which, 

 in this country, are known by the name Fungites. 

 But the chambers are distinct, although no per- 

 foration can be observed. We may add, that the 

 history of this fossil is far from complete, and we 



