AArATOMV AND DEVELOPMENT. 



219 



Fig. 105. — Metamorphosis of Ciojia intestinalls • above is represented tVie 

 anterior portion of tiie free-swimming larva from tire left side; on the left, the 

 larva, shortly after fixation, from the right side; and on the right, the stage at 

 which the change of axis commences, from the left side. (After WtLLEY,) 



a. Atrial aperture, b. Branchial sac. ch. Notochord. e. Endostyle. / Organ 

 of fixation, g. Ganglion. //. Neuropore (having reopened into branchial sac). 

 I. Intestine. /. Pyloric gland. m. Mouth, n. Nerve-tube. oe. CEsophagus. 

 tit. Eye. ot. Otocyst. p. Pericardium, j. Stomach, st. Stigmata. ;■. Tail. 



