42 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 



(7) Tlie conneotioiis of the small lateral gang-lia are slightly 

 ditTerent from those of most other insects so far described. 



(8) The ganglia are rather large as compared with the 

 small size of the animal. 



(9) The nerve cells are very small, smallei' than the nnclei 

 of some other cells of the body. 



Important References 

 Becker. E. 1910 



Zum ]!;iu dcs Postantenalorgans der Collemliolen. Zeit. f. 

 Wiss. Zool. Bd XCIV, Ilefte 3. 



Boeitger, 0. 1910 



Das Gehirn eines neideren Insektes (Lepisma saeearina L.) 

 I nag. Dis. Univ. Jena. 



Grassi, B. 1889 



Anatoinie coinparce des Thysanoures, Arch. It. Biol. 

 Philiptschenko, Jiir. 1912 



Beitrage zur Kenntnis der Aptergoten. Ill Die Embry- 

 onalentwieklung von Isotoiua einerea Nie. Zeit. f. Wi.ss. Zool. 

 Bd. cm Heft 4. 



(Conlribulioii fratn the Zoological Labovatory of Pomona College.) 



