190 



Carina \fa^ regular, fmooth, and even; not undulated as 

 there reprefenied, nor is the centre furniflied with fuch 

 elevated knobs. 



The figure given by Walker for the A^. Calcar, ap- 

 pears to be our fliell in a mutilated ftate ; that part of the 

 body whirl which enters the mouth, having been broken, 

 gives the aperture a very extended appearance. Such an 

 appearance accident has thrown in our way, and there- 

 fore we are inclined to think, that the figure above quoted 

 in Walker, was taken from an imperfeft fpecimen of 

 our fliell. Much allowance indeed mult be made, for the 

 figures of fueh minute objefts, highly magnified under a 

 microfcope; the eye which examines, and the pencil 

 which delineates them, will occafionally vary: indeed, we 

 perceive fo confiderable a difference between the original 

 drawings of this, and other fliells of Mr. Walker, and 

 the engravings taken from them, that we fliould fcarce 

 have known them to be the fame: had thev not been 

 marked with the fame numbers. 



6. * 



Depressulus. Nautilus: fpiralis, utrlnque fubumbilicatus, geniculis depref- 



fis plurimis. Walk. Miu. Shells, f. 6S. 



Nautilus deprefTulus. Turt. lin. iv. p. 306.. 



Adams Microfc. p. 641. t. 14. f. 33. 



N. with a fpiral, fub-umbilicated flicll, with many de- 

 prefTed joints ; colour opaque white. 



From Reculver : very rare. 



Nautilus 



