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Studies on the comparative anatomy of sponges 1888 dendy arthur on amazoncom free shipping on qualifying offers studies on the comparative anatomy of sponges 1888. Studies on the comparative anatomy op sponges 5 straight and cylindrical with a pore sieve opening into it at one end and a vent at the other such then was the state of our knowledge of grantia labyrinthica one of the most remarkable of all the calca reous sponges when i commenced my investigations how. Comparative development and evolution body plan evolution abstract reconstructing the earliest events in animal evolution including the origin of novel cell types and developmental signaling pathways depends upon comparative research between traditional research models with four understudied lineages sponges ctenophores placozoans and . studies on the comparative anatomy of sponges 1888 dendy arthur on amazoncom free shipping on qualifying offers studies on the comparative anatomy of sponges 1888 studies on the comparative anatomy op sponges 5 straight and cylindrical with a pore sieve opening into it at one end and a vent at. The first period of sponge development studies falls on the last third of the 19 th century it was the golden age of sponge embryology about 110 articles on this topic were published fig 2