EXPLANATION OF THE LETTEEING OF THE PLATES. 



Corona . 



Lobe of do. 



Styligerous prominence 



Chin 



Ciliated cup . 



Hook 



Horny processes 



Foot 



Toe 



Ciliary wreath 



Principal wreath 



Secondary wreath 



Taster 



Vestibule 



Buccal funnel 



Lips 



Tube from lips to crop 



Crop 



Mastax . 



Tropbi 



or 

 Jaws 



(Esophagus 



Stomach . 



Intestine 



Becturn . 



Cloaca 



Salivary gland 



Gastric gland 



Foot gland 



Lateral canal 



Vibratile tag 



Contractile vesicle 



Ovary 



Germ 



Ovum 



Oviduct . 



Penis 



Sperm-sac 



Longitudinal muscle 



Transverse muscle 



Ganglion 



Eye 



Dorsal antenna 



Lateral antenna 



Tactile style . 



Nerve thread . 



malleus 



mm 

 us 

 rs 



fin 



\ Parts of head and body. 



manubrium Nutritive system. 



uncus 



ramus 



fulcrum 



Secreting system. 



Vascular system. 



Reproductive system. 



Muscular system. 



,'Xii'vinis system. 



