The stinted growth of the stationary Conchifera forms a striking contrast with the size and number of the Cephalopoda interred with them in the same bed; in fact the dawning existence of these Conchifera appears to have been a struggle for life, whilst the conditions of the closing scene of the Belemnites, Nautili, and falciferous Ammonites, were favourable to their continuance in time, but abruptly brought to a termination by some great physical change which took place about the commencement of the deposition of the oolitic formations.
Source: wiktionary
The third group is continued into the sands which cap the upper lias, and into strata a little above them, which constitute the lower part of the inferior oolite of Dundry. Even in the Stonesfield slate we find falciferous ammonites.
Source: wiktionary
More or less falciferous — that is, united to t’ shaft by an arched web-like expansion. Separate or webbed together umbrella-like.
Source: wiktionary
This form of suture is seen even in the falciferous Ammonites of the Cretaceous, which can scarcely perhaps, be genetically connected with […]
Source: wiktionary
Showing 4 of 7 available sentences.