ClipArt ETC
"Portion of a similar embryo at a later stage of growth. The praegenital somite, VII PrG, is still present, but has lost its rudimentary appendages; go, the genital operculum, left half; KM, the left pecten; abp4 to abp7, the rudimentary appendages of the lung-sacs." — The Encyclopedia Britannica, 1910

Embryo

"Portion of a similar embryo at a later stage of growth. The praegenital somite, VII PrG, is still present,…