ABBREVIATIONS. 



can.o.ceb. Canal of cerebral organ. h'drm. 



cl. gn. I., II, III. Ganglionic cell I., II., leu'cy. 



or III. mb. ha. 



cl.JU. Filamentous hypoderm cell. mit. 



cl. pig. Pigment cell. mu. ax. 



cl. sns. Sensory cell. n'gl. 



corns, a. Anterior commissure of brain. n'gi.ul. 



coins, d. Dorsal " " n. mu. ret. 



corns, oe. Oesophageal connective. nl. sns. 



corns, v. Ventral commissure of brain. n. spl. 



c<m't. lis. Connective tissue. n. ta. 



cps. enc. Capsule of brain. o. ceb. 



emu. d. Dorsal horn of tentacular fold. or. 



ct. Cutis. pa'mit. 



eta. Cuticula. pap. 



gl." Bicellular gland. pli. ta. 



gl." dt. Duct of bicellular gland. plx. ><. drm 



gl." env. Envelope " pr'c. dg. 



gl." nl. Nucleus " " rm. gl. 



gl." vl. Vacuole " rm mu. 



gl.'" Multicellular gland. spht. 



gl.'" dt. Duct of multicellular gland. va. sng. d 



gl.'" env. Envelope " in. sng. v. 



gl.'" n.fbr.' Nervous fibrilla to multicel- z. lev. 



lular gland. z. pap. a. 

 gl.'" nl. Nucleus of the multicellular 



gland. 2. pap. p. 

 gn. su'ee. Supracesophageal ganglion. 



Hypodermis. 

 Leucocytes. 

 Basement membrane. 

 Mitome. 



Circular muscles. 

 Neuroglia. 

 Neuroglia nucleus. 

 Nerve of retractors. 

 Nucleus of sensory cell. 

 Splanchnic nerve. 

 Tentacular nerve. 

 Cerebral organ. 

 Mouth. 

 Paramitome. 

 Papilla. 



Tentacular fold. 

 . Dermal nerve plexus. 

 Digitate processes of brain. 

 Glandular branch of plexus. 

 Muscular " 



Sphincter of cerebral canal. 

 Dorsal blood-vessel. 

 Ventral bloodvessel. 

 Smooth zone of introvert. 

 Anterior papillate zone of 



introvert. 

 Posterior papillate zone of 



introvert. 



