. Text-book of embryology. Embryology. XVI EGHINODEEMATA 519 place very gradually as growth proceeds. The mouth becomes open ®. Fig. 391.—Oral and aboral views of young sea-urchins immediately after the metamorphosis. (After von tJbich.) A, oral view of young imago of Echirms microtuhercidatus. B, aboral view of young imago of Utron- gylocentrotus li/vidus. B1-B5, the five basal (genital) plates, , aboral spines of imago ; , azygous (primary) tentacle; dent, rudiment of tooth; , epineiiral veil; j, rudiment of jaw; 0, position of adult mouth ; }), oral spines of imago ; ped, pe
. Text-book of embryology. Embryology. XVI EGHINODEEMATA 519 place very gradually as growth proceeds. The mouth becomes open ®. Fig. 391.—Oral and aboral views of young sea-urchins immediately after the metamorphosis. (After von tJbich.) A, oral view of young imago of Echirms microtuhercidatus. B, aboral view of young imago of Utron- gylocentrotus li/vidus. B1-B5, the five basal (genital) plates, , aboral spines of imago ; , azygous (primary) tentacle; dent, rudiment of tooth; , epineiiral veil; j, rudiment of jaw; 0, position of adult mouth ; }), oral spines of imago ; ped, pedicellaria; Ti-Tg, the five terminal (ocular) plates ; , paired tube feet. by the shrivelling of the epineural veil, and if the little animal be kept in salt water which is aerated by forcing air into it, and in. 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 MacBride, E. W. (Ernest William), 1866-1940; Kerr, John Graham, 1869-; Heape, Walter, 1855-1929. London : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpubli, booksubjectembryology
