70 



Fig. 2 is from a cast also in ferruginous sandstone, 

 from the low Cliff under Reculvers Church, in Kent. 



Fig. 3 ; the shell remaining in the sandstone of 

 Bognor Rocks. 



Fig. 4 ; two views of a Higligate specimen. And 

 Fig. 5, a similar one from Folkstone. Specimens re- 

 sembling those from Maidenhead are also found in 

 Gunter's-hill Sand-pits, near Emsworth, Hants, as I am 

 informed by ray good Friend Js. Holloway, Esq. 



ROSTELLARIA calcarata. 



TAB. CCCXhlX.—Figs. 6 and 7. 



Spec. Char. Tnrreted, costated, transversely 

 striated ; costae linear, curved ; last whorl 

 carinated ; outer lip furnished with a large 

 oblong process, the upper angle of which is 

 formed into a long curved spine ; beak 

 pointed ; superior canal obtuse. 



Parkinson, Vol. III. p. 63, tab. 5, f. 2. 



J. HE last whorl of this elegant shell has several carinas 

 besides the principal one, but they are very little ele- 

 vated : the spire has no carinas, but is costated, and has 

 some varicose sutures remaining upon it, which do not 

 occur in the preceding species. The squarish wing-like 

 process upon the outer lip is somewhat variable in form, 

 its angles being more or less conspicuous : the spine 

 from its upper angle is an elongation of the carina upon 

 the whori : the inner lip is entire, with a rounded edge. 



This shell was first noticed by Parkinson : it is by no 

 means rare in the whetstone-pits of Blackdown. The 

 largest individual I have seen belongs to Mr. De la 

 Beche ; it is given at fig. 6. The specimens are all sili- 

 cious casts. 



