Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Cleavage period at the 1.5 hour 16 cell stage. The animal pole is to the top for the early stages, and anterior...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Blastula period at the 3 hour 1000 cell stage. The animal pole is to the top for the early stages, and anterior ...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Gastrula period at the 6 hour shield stage. The animal pole is to the top for the early stages, and anterior is ...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Gastrula period at the 9 hour 90% epiboly stage. The animal pole is to the top for the early stages, and anterio...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Segmentation period at the 12 hour 6 somite stage. The animal pole is to the top for the early stages, and anter...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Blastula period at the 2.75 hour 512 cell stage. The animal pole is to the top for the early stages, and anteri...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Blastula period at the 3.3 hour high cell stage. The animal pole is to the top for the early stages, and anteri...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is in the Segmentation period at the 14 hour 10 somite stage. The animal pole is to the top for the early stages, and ant...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is from the Pharyngula period at the 31 hour Prim-16 stage. The animal pole is to the top for the early stages, and anteri...

Camera lucida sketches of the zebrafish embryo at selected stages. This image is from the hatching period at the 60 hour pec-fin stage. The animal pole is to the top for the early stages, and anterio...