Origin of Porifera
Examples from the Web for porifera
The sponges have received the name of Porifera, on account of the structure above described.Stories of the Universe: Animal Life|B. Lindsay
It appears that in the present unsatisfactory state of our knowledge the larv of the Porifera may be divided into two groups: viz.
The later stages in the development of the larv of the Porifera are not similar to anything we know of in other groups.