. The study of animal life [microform]. Zoology; Zoologie. Fig. of fowl, a ; dog, b; mane. (From Chambers's EmyckK; ' after Haeckel.) Fritz MuUer, in his Facts for Darwin, illustrated the same idea in relation to Crustacea. When a young cray- fish is hatched, it is practically a miniature adult. When a young lobster is hatched, it differs not a little from the adult, and is described as being at a Mysis stage,—Vysis being a prawn-like crustacean. It grows and moults and becomes a little lobster. When a crab is hatched, it is quite unlike the adult, it is liker one of the humblest C
. The study of animal life [microform]. Zoology; Zoologie. Fig. of fowl, a ; dog, b; mane. (From Chambers's EmyckK; ' after Haeckel.) Fritz MuUer, in his Facts for Darwin, illustrated the same idea in relation to Crustacea. When a young cray- fish is hatched, it is practically a miniature adult. When a young lobster is hatched, it differs not a little from the adult, and is described as being at a Mysis stage,—Vysis being a prawn-like crustacean. It grows and moults and becomes a little lobster. When a crab is hatched, it is quite unlike the adult, it is liker one of the humblest Crustacea such as the common water-flea Cyclops, and is described as a Zoea. This Zoea grows and moults and becomes, not yet a crab but a prawn-like animal with ex- tended tail, a stage known as the Megalopa. This grows anc moults, tucks in its tail, and becomes a young crab. And again, when the shrimp-like crustacean, known as rcmnis, is hatched, it is simpler than any known crustacean, it is an unringed somewhat shield-shaped little creature with three pairs of appendages and a median eye. It is kno\\n as a Nauplius and resembles the larvie of most of the simpier crustaceans. It grows and moults and becomes a '-^oea, grows and moults and becomes a Mysis, grows nd moults and becomes a Penceus,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Thomson, J. Arthur (John Arthur), 1861-1933; Knight, Professor. Toronto : Morang
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
