...singular and, so far as I know, unique structure. Supposing it to rest upon its convex surface, it consists of a lower plate, shaped like a deep saucer or watch-glass ; of an upper plate, which is sometimes flat, sometimes more or less watch-glass-shaped ; of the oval, thick-walled,...

...singular and, so far as I know, unique structure. Supposing it to rest upon its convex surface, it consists of a lower plate, shaped like a deep saucer or watch-glass ; of an upper plate, which is sometimes flat, sometimes more or less watch-glass-shaped ; of the oval, thick-walled,...

...more clear, Professor Huxley says, " supposing it (a Cyatholith) to rest upon its curved surface, it consists of a lower plate, shaped like a deep saucer or watch-glass ; of an upper plate which is sometimes flat, sometimes more or less watch -glass shaped ; of the oval thickwalled,...

...very singular and, so far as I know, unique structure. Supposing it to rest upon its lower surface, it consists of a lower plate, shaped like a deep saucer or watchglass; of an upper plate, which is sometimes flat, sometimes more or less watchglass-shaped ; of the oval, thickwalled,...

...very singular and, so far ns I know, unique structure. Supposing it to rest upon its lower surface, it consists of a lower plate, shaped like a deep saucer or watchglass ; of an upper plate, which is sometimes flat, sometimes more or less watchglassshaped ; of the oval, thick-walled,...