II 



266 EXTINCT MONSTERS. 



one and the same time. We may accordingly take it for granted that 

 these imprisoned skeletons were those of foetuses. It is, however, 

 very remarkable, that, so far as we are aware, all the skeletons with 

 foetuses belong to one single species ; thus suggesting that this 

 particular species was alone viviparous." 



It is to be hoped that further discoveries will be made, such as may 

 finally settle this question. One would have expected that in some 

 cases the young ones, if foetal, would be imperfectly developed. 



