PLATE IX. 
Fig. 1. Front view of the brain of CalopUnnx ft mur-rubrum : opt. gang., optic ganglion; 
OC., ocelli and nerves leading to them from the two hemispheres, each ocel- 
lar nerve arising from the region containing the calices; m. oc., median 
©cellar nerve ; opt. I., optic lohe sending oil . the optic nerve to the optic 
ganglion; ant. I., antenna! or olfactory lohe; ant.n., antennal nerve ; f.g., 
frontal ganglion of sympathetic nerve; Ibr. n., nerve to lahriun ; x, cross- 
nerve or commissure between the two hemispheres ; 03. c, oesophageal com- 
missure to snbrcsophageal ganglion. 
2. Side view of the brain and subcesophageal ganglion (lettering of brain as in 
fig. 1): 8. g., 6tomatogastric or sympathetic nerve; a. s.g., anterior, and 
p. a. g., posterior, sympathetic ganglia ; g. 2, suboesophageal ganglion ; md., 
nerve to mandible; nix., maxillary nerve ; /«., labial nerve; n. f, unknown 
nerve, perhaps salivary t 
3. Interior view of the right half of the head, showing the brain in its natural 
position: an., antenna; ch, clypens; Ibr., labrum; m., mouth cavity ; md., 
mandible; t., tongue; a., oesophagus; c, crop; en., right half of the eudo- 
cranium or X-shaped bone, through the anterior angle of which the oesopha- 
gus passes, while the great mandibular muscles play in the lateral angles. 
The moon-shaped edge is that made by the knife passing through the center 
of the X. 
4. View of brain from above (letters as before). 
5. Snboesophageal ganglion from above : t. c, commissure to the succeeding tho- 
racic ganglion ; other letters as before. 
Fig. 3 is enlarged eight times ; all the rest twenty-five times. 
Note. — The figures on this plate were drawn from original dissections by Mr. 
Edward Burgess. 
