IV 



PHYLUM CCELENTERATA 



173 



ost. / 



tries, f 



<z 





-V 



V./n 



FIG. 124. Tealia crassicornis. A, dissected specimen ; B, transverse section, the half 

 above the line ab through the gullet, the lower half below the gullet ; d. //its. directive 

 mesenteries ; </o>i. gonads ; gul. gullet ; 1. m. longitudinal muscle ; I p. lappet ; Hits. 1, primary ; 

 JH.CS. 3, secondary ; -nies. 3, tertiary mesenteries ; mcs. /. mesenteric filaments ; mtli. mouth ; 

 ost. 1, ost. 2, ostia ; p. m. parietal muscle ; .<tji/i. siphonoglyphe ; s. i:i. sphincter muscle ; t. m. 

 transverse muscle. 



