200 JOUENAJL OF ENTOMOLOGY AND ZOOLOGY 



9. There are very sliglat indications of mnshroom bodies. 



10. Apparently the two great masses of cells in the brain are 

 associated with the mandibulo-rostral and optic nerves. 



11. The peripheral ganglia 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 subesojihageal 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. 

 soc. proc. vol. XXVI. 



Bertkau, Ph. 1887 



Ueber den Bau der Chernetiden oder Pseudoscorpione. 

 Sitz. ber, d. Niederrh. Ge.selk-h. f. Nat. ii. Heilkimde. Bonn. 



Boerner, C. 1904 



Zur kenntniss der Pedipalpiden. Zoologica, Bd. XVII. 



Brandt, F. _ 1840 



Reeherches sur I'anatomie des Araigneos. Ann. se. nat. 2e 

 ser. XIII. 



Croneherg, A. 1888 



Beitrag zur Kenntniss des Baues der Pseudoscorpione. Bull. 

 Soc. Imp. de.s Nat. Moscou. 



Grube 1842 



Einige Besnltate aus Untersuehiing ueber die Anatomic der 

 Araneiden. 



Gauhert 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. 



