9 



:'iIUREXalvet)latiis. 



TAB. CCCCXl.— /-^. 2. 



Spec. Char. Ovate acuminated ; surface di- 

 vided into square cells by many acute 

 sutures -that decussate 8 or 10 prominent 

 cariutE ; whorls ventricose, flattened above ; 

 aperture oval, the outer lip toothed within. 



J. HE length is at least double the width ; the upper - 

 most carina is largest; the principal ones below it, al- 

 ternately large and small, with still smaller ones between 

 them ; they are all rounded. The beak is a little curved, 

 and contains an open umbilicus. 



Found in the Crag of Suffolk and Norfolk by Mrs. 

 Cobbold, and the Rev. G. R. Leathes ; it seldom ac- 

 quires an inch and an half in length. 



MUREX defossus. 

 TAB. CCCCXI.-/^. 1. 



Spec. Ckar. Ovate acuminated, smooth ; 



whorls ventricose, bearing many obtuse 



carinse ; sutures numerous, acute, linear; 



aperture elongated, with many lamelliform 



teeth witliin its outer lip. 

 Syn. Buccinura defossum, Pilkington in Linn. 



Trans. VII. 1 17. 



Hetvveen the elevated edges of the sutures, the surface 

 is smooth, but divided by many (1*2 or more upon the 

 last whorl) transverse, rounded, alternately large and 

 small elevations or keels, that do not by their various 

 sizes destroy the round contour of the whorls ; the outer 

 lip is thickened internally, where it has many elongated, 

 lamellar teeth ; the inner lip is, when fully formed, re- 

 lieved from the columella, and has one or two irregular 

 plaits upon its upper part ; the beak is ratiner short. 



A species sent among others from ilordvvell ; its 

 sutures are not generally varicose, the smoothness of the 

 surface between them, gives it a neat appearance. 



