X. Observations on the Specimens of Hippurites from Sicily^ 

 presented to the Geological Society by the Hon. Henry Grey Bennet. 



Bv James PakkinsoNj Mem. Geol. Soc. 



Ti 



HE exammation of the excellent series of Hippurites, from 

 Cape Passaro, In Sicily, presented to the Society by the Hon. 

 H. G. Bennet, has occasioned the present endeavour to add to the 

 knowledge of the nature and oeconomy of the animal, whose re- 

 mains are thus beautifully preserved. The specimens are indeed 

 such as demand, that they should obtain the particular attention 

 of the Society, since they possess those characters which will 

 probably serve to correct some erroneous opinions respecting the 

 nature and habits of the animals of which these shells were the 

 dwellings. 



These fossils exactly agree with the description of M. Lamarck, 

 being straight or boisoed conical shells^ furnished internally with 

 transverse septa^ and with two longitudinal^ lateral, obtuse and 

 converging ridges. These characters are distinctly observable In one 

 of the specimens* which contains, with several other remains of these 

 fossils, a nearly perfect shell, longitudinally divided, so as to dis- 

 play very beautifully the two ridges, with the numerous septa and 

 chambers. In another, "f a longitudinal section of one of these 

 fossil shells, the same parts are shewn, and the extreme thinness 

 of the septa, and the closeness with which they are placed to each 

 other, are particularly observable. 



* No. 1. of the Scries. + No. 2. 



