Crossword-Solution: ZOEA 4 letters, 1 clue 🏆 scrabble score: 13

You ask about the skipping of the Zoea stage in fresh-water decapods: is this an illustration of acceleration? It most assuredly is, if acceleration means anything at all.

Again, another and more general illustration would be, if, among the marine decapods, a series could be formed in which the Zoea stage became less and less important in the development, and was relegated to younger and younger stages of the development, and finally disappeared in those to which you refer.

Perhaps this to which you allude is an illustration somewhat similar to the one which I have spoken of in my series, a--ab--abc--ae--------ad, which like "a d" comes from the earliest of a series, though I should think from the entire skipping of the Zoea stage that it must be, like "a e," the result of a long line of ancestors.

Dallas under the title "Facts for Darwin."] [Footnote 16: "Whether that common stem-form of all the Tracheata [Insects, Myriopods and Spiders] which I have called Protracheata in my 'General Morphology' has developed directly from the true Annelides (Coelminthes), or, the next thing to this (_zunachst_), out of Zoea-form Crustacea (Zoepoda), will be hereafter established only through a sufficient knowledge and comparison of the structure and mode of growth of the Tracheata, Crustacea and Annelides.

The same process, carried further, leads to the very peculiar larva known as the _Zoea_, in the typical form of which, found in the Brachyura (fig.