200 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 
9. There are very slight indications of mushroom bodies. 
10. Apparently the two great masses of cells in the brain are 
associated with the mandibulo-rostral and optic nerves. 
11. The peripheral gangla are represented by irregular 
masses of cells. 
12. Besides numerous short connections there are large 
tracts running from the brain to other levels, and a dorsal and 
ventral longitudinal tract in the subesophageal ganglion. 
13. There are two to three well marked commissures in the 
ventral mass of the nervous system. 
14. The brain is closely fused with the ventral mass of the 
ganglion. 
15. There are no abdominal ganglia. In general the nervous 
system is more like that of a spider than of a scorpion. 
REFERENCES 
Allen, W. E. 1904 
Internal morphology of the American cattle tick. Am. mic. 
soe. proc. vol. XXVI. 
Bertkau, Ph. 1887 
Ueber den Bau der Chernetiden oder Pseudoscorpione. 
Sitz. ber, d. Niederrh. Gesellch. f. Nat. u. Heilkunde. Bonn. 
Boerner, C. 1904 
Zur kenntniss der Pedipalpiden. Zoologica, Bd. XVII. 
Brandt, F. 1840 
Recherches sur l’anatomie des Araignéos. Ann. sc. nat. 2e 
ser. XIII. 
Croneberg, A. 1888 
Beitrag zur Kenntniss des Baues der Pseudoscorpione. Bull. 
Soe. Imp. des Nat. Moscou. 
Grube 1842 
Einige Resultate aus Untersuchung ueber die Anatomie der 
Araneiden. 
Gaubert 1893 
Sur un ganglion nerveux des pattes du Phalangium opilio. 
Comp. rend. acad. se. t. CXV, no. 22. 
Hilton, W. A. 1912 
A preliminary study of the central nervous system of spiders. 
Pomona jour. ent. vol. IV, no. 3. 
