
786 ALLIS. 
EXPLANATION OF PLATE XXVII. 
FIG. 31. Same as Figs. 29 and 30, but a still deeper dissection. The coronoid 
process of Meckel’s cartilage has been removed, the lateral canals in the preoper- 
culum exposed, and the gill filaments removed from the branchial arches. X 1%. 
Fic. 32. Same as above, but still deeper. The hyoid and pterygo-palatine 
arches have been almost entirely removed so as to expose the branchial arches 
and the levatores arcuum branchialium. X 1%. 
