il36 



ZOOLOGY 



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Fig. 137.— Tealia crassicornis. A, dissected specimen ; 6, transverse section, the half 

 above the line ab through the gullet, the lower half below the gullet.' d. ma. directive 

 mesenteries ; fjon. gonads ; (lul. gullet ; I. m. longitudinal muscle ; //i. lappet ',-mes. 1, primary^ 

 mes. 2, secondary, mes. 3, tertiary mesenteries; mes. f. mesenteric filarffents ; mfli. mouth; 

 08t. 1, ost. 2, ostia ; p. m. parietal muscle ; sgpk. siphonoglyphe ; s. nt- sphincter muscle ; t. m- 

 transverse muscle. 



