FIG, 339 
Figs. 339-344. — The brain of fishes. The dorsal view of each brain is shown in the — 
upper figure, the ventral view immediately below. 339. Bdellostoma. (After JOH, 
MULLER.) 340. Petromyzon (Ammocates stage). (After ZIEGLER’S model.) 34%. 
Shark (angel-fish, Sguatina), (After DUMERIL.) 342. Chimera, (After WILDER.) 
343. Lung-fish, Protopterus. (After BURCKHARDT.) 344. Perch, Perca, (After T. J. 
PARKER.) an 
. AQS, Aqueduct of Sylvius. DSZ, Diverticula of saccus endolymphaticus. 2, — 
272 : 
