Kenyon, TJie Brain of the Bee. 



207 



EXPLANATIONsOF PLATES. 



EXPLANATION OF COLORS. 



Red. Cells and fibers of the mushroom bodies. 



Blue. Sensory fibers from cells outside of the central cerebral mass. 

 Violet. Tracts connecting the calices of the mushroom bodies with other 

 parts of the nervous system. 



Green. The superior dorso-cerebral commissure. 



Brown. Motor and other efferent fibers. 



Black. I Association and miscellaneous fibers and cells. 



EXPLANATION OF ABBREVIATIONS. 



a. c. — Anterior commissure. 



a h. — Anteror roots of the mushroom 



bodies. 

 a. i. c. — Antero-inferior dorso-cerebral 



commissure. 

 A. L. — Antennal lobe. 

 a m. — External antenno-motor nerve. 

 a. m^. — Internal antenno-motor nerve. 

 a. s. — Antenno-sensory fibers. 

 c. b — Central body. 

 c, c. — Fibrillar arch. 



c. cb. — Commissure of the central body. 

 clx. — Calices of the mushroom bodies. 



d. V. — Dorso-ventral tract. 



e. clx. — Calices of the outer mushroom 



bodies. 

 F. — Oesophageal foramen. 

 g. cb. — Tubercles of the central body. 

 i. clx. — Calices of the inner mushroom 



bodies. 

 i. h. — Inner roots of the mushroom 



bodies. 

 i. 0. c. — Inferior optic commissure. 

 /. — Labial nerve. 

 /. cb. — Lower portion of the central 



body. 

 /. t, 2g. — The antero-posterior optic 



tract. 

 md. — Mandibular nerve. 

 mx. — Maxillary nerve. 



£>• o^and d^ — Antenno-cerebral tracts. 

 0^ inner, o^ middle, 0^ out- 

 er. 



o. b. — Olfactory bodies or glomeruloe. 



0. c. — Ocelli, oc.^ median; oc."^ right, 

 oc.^ left. 



oc. n. — Posterior group of fibers from 

 the ocelli. 



op. b. — Optic body. 



p. — Posterior nerve. 



p, i, c. — Postero-inferior dorso-cerebral 

 commissure. 



/. 0. t. — A posterior optic tract. 



r. 0. g. — Region of the ocellar glomer- 

 uli. 



s. — Stomatogastric nerve. 



s. n. — Nerve of the salivary glands. 



s. o. c. — Superior optic commissure. 



s,ce. g. — Ventro-cerebron or suboeso- 

 phageal ganglion. 



t. op. b. — Anterior optic tract (to the 

 optic body). 



St. — Stalks of the mushroom bodies. 



n, c. — The superior dorso-cerebral com- 

 missure. 



u. c. b. — Upper portion of the central 

 body. 



u. t. 2g. — Antero-superior optic tract. 



u. t. T,g. — Postero-superior optic tract. 



V. c. — Ventral column. 



2.— Small cells of mushroom body. 



