PLATE XII 
Fic. 1.— Enlargement of the posterior ganglia. 
Fic. 2.— Enlargement of the cerebral ganglion. 
Fic. 3.— Enlargement of the pedal ganglion. 
Fic. 4.—The young of anodon taken from the gill. 
Fic. 5.— The labial palpi held open and at right angles to the body, showing 
their inner surfaces. 
1. p. Labial palpi. m. Mouth. 
Fic. 6.— One of the labial palpi. 7 
Fie. 7 —Two of the ridges on the labial palpi enlarged, showing cilia. 
Fic. 8.— Enlargement of interior of a palpus. 
Fic. 9.— Enlargement of exterior of a palpus. 
