GEOLOGY OF CENTRAL INDIA. 45 



lamellatedpolypifers? some of the detached specimens somewhat resemble 

 the styliform axis of the genus stylina. 



No. 2— Is also exceedingly common in these limestones, and I 

 believe that at least two varieties of it may be traced, — probably, indeed, 

 more. The one is a flattened, polymorphous, lobated, mass — some- 

 times seen covering the rock, over a square surface of a foot, or a foot and 

 a half, and even more. No. 2 is detached, generally of the size repre- 

 sented, and it protrudes from the mass something in the form of a pear. 

 It has a stalk like appendix. 



The above remains occur protruding into the calcareo-argillaceous 

 substance described as separating the strata. In the solid rock, the 

 traces of them, if perceived at all, are very indistinct, a circumstance 

 probably owing to the delicacy of their original structure. The rounded 

 and lobated masses, indeed, appear to terminate abruptly on the side 

 towards the solid strata, and their whole aspect gives rise to the belief, 

 that during the deposition of these strata, short intervals occurred, — that 

 the remains at their surface were left partially exposed, and that the infe- 

 rior positions of these were lost in the solid rock, while their superior 

 were, by this arrangement, more slowly impregnated with calcareous 

 matter, which enabled them, on the deposition of the superjacent stratum, 

 to retain something of their original form, — and that, in consequence of 

 the delicacy of their structure, almost all traces of organization were 

 destroyed. The interior of these remains presents, in many instances, 

 a pure white crystalline mass, exactly similar to the finer varieties of 

 primitive marble, — in other instances they have a loose, inclining to 

 chalky, structure, and they are generally covered with a brownish crust, 

 the centre being either pure white or dirty white, and rarely of the color 

 of the limestone itself. 



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