. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. Fig. 243.—Stage in the con- version of Tornaria into Bala- jjoglossus, with one pair of branchial slits (after B. Met- schnikoff), seen from the side. So, external branchial open- ing ; P, peritoneal sac; Vc, circular vessel; O, mouth; C, he\rt. Fig. 244.—Stage in the conver- sion of Tornaria into Balano- glossus, with four pairs of branchial slits (after Al. Agassiz). Letters as in figs. 242 Please note that these images are extracted from scanned page images that may have been digitally enha
. Elementary text-book of zoology, general part and special part: protozoa to insecta. Animals. Fig. 243.—Stage in the con- version of Tornaria into Bala- jjoglossus, with one pair of branchial slits (after B. Met- schnikoff), seen from the side. So, external branchial open- ing ; P, peritoneal sac; Vc, circular vessel; O, mouth; C, he\rt. Fig. 244.—Stage in the conver- sion of Tornaria into Balano- glossus, with four pairs of branchial slits (after Al. Agassiz). Letters as in figs. 242 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 Claus, Carl, 1835-1899; Metcalf Collection (North Carolina State University). NCRS. London, Swan Sonnenschein
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanimals, bookyear1892
