108 



The following species probably belong to the 1st Section. 

 BELLEROPHON apertus. 

 TAB. CCCCLXIX.— ». 1. 



Spec. Char. Nearly sphaerical, without a 

 band? inner whorls concealed, axis solid; 

 sides of the aperture expanded. 

 The sinus in the front of the aperture, and the expan- 

 ded sides are conspicuous in full grown individuals of 

 this species, which are from two to four inches in 

 diameter ; as we ha\e but little more than casts of the 

 inside, the cast of the shell itself continuing no farther 

 than two or three of the innermost whorls, we are not 

 positive of the nonexistence of a band ; the surface seems 

 to be smooth, and the shell is very thick, so that the 

 cast appears to be umbilicated, and shews the inner 

 whorls : the front is rather prominent, and forms a kind 

 of depressed and dilated keel around the Avhorl ; the ex- 

 tremities of the aperture are rather square. 



The specimens just described were found in Lime- 

 stone at Carlingford, in the County of Louth, and pre- 

 sented by Samuel Wright, Esq. of Cork : they consist of 

 compact Limestone, with many minute crystals ot 

 Carbonate of Lime, and a few of Sulphate of Barytes 

 scattered over them. We have seen a large one from 

 Settle in Yorkshire. 



We have specimens of an analogous shell from Ken- 

 dal, another from Ireland, and a third from Bristol, all 

 of which seem to be really umbilicated; that from 

 Ireland, has the cast of the outer surface of the shell, 

 and is quite smooth : we wish to see more specimens of 

 these before figureing them. 



-^mi^^-— — ' 



BELLEROPHON Cornu-Arietis. 

 TAB. CCCCLXIX.-^/?;^. 2. 



Spec. Char. Rather compressed; whorls 

 few, rapidly enlarging, carinated near the 

 aperture; aperture expanded; shell very 

 thick ; sinus large and angular. 



The expanded lip of the aperture of this species is 

 divided by the sinus into two rounded lobes ; we know 

 not whether the shell is umbilicated or not, as we 

 possess only casts of the inside ; the shell appears to be 

 3-8ths of an inch thick in some parts ; the inner whorls 



are very small. i i • w * 



Found in a brownish limestone, near Kendal, m^^e^^- 

 moreland; the space formerly occupied by the bhell, i^ 

 partly filled with white caitiircous Spar. 



