. Journal of experimental zoology. Fig. 10 Fig. 11 Fig. 12 Figs. 7 to 12. Graphic reconstructions showing the form and relations developed by transplanted earvesicles, one to three months after the operation. In all six cases the right ear vesicle was removed andthe left vesicle transplanted into a subdermal pocket between eye and nostrU. In Figs. 7, 8, 9 and 10the acoustic nerve and ganglion extended from ear vesicle toward brain; in Fig. 7 the connection wascomplete, the fibers entering at junction of fore-brain and olfactory lobe. Central nervous system,shaded; ear vesicle, solid black. 55^
. Journal of experimental zoology. Fig. 10 Fig. 11 Fig. 12 Figs. 7 to 12. Graphic reconstructions showing the form and relations developed by transplanted earvesicles, one to three months after the operation. In all six cases the right ear vesicle was removed andthe left vesicle transplanted into a subdermal pocket between eye and nostrU. In Figs. 7, 8, 9 and 10the acoustic nerve and ganglion extended from ear vesicle toward brain; in Fig. 7 the connection wascomplete, the fibers entering at junction of fore-brain and olfactory lobe. Central nervous system,shaded; ear vesicle, solid black. 55^ George L. Streeter Conclusions In the tadpole the ear vesicles are essential for the developmentof the power of equilibration, but the study of normal specimensshows that well developed equilibration may be present beforethe completion of the semicircular canals; the latter as such aretherefore not essential. When both vesicles are removed no other organ compensatesfor their loss and the animal is completely and permanently help-
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1904
