LUMINOUS INSECTS. 429 



of nippies and sometimes of milk in man proves that 

 the breast of u'oman is not meant for the support of her 

 offspring-. We often see, without being- able to ac- 

 count for the fact, except on Sir E. Home's idea, that 

 the sex of the ovum is undetermined % traces of an or- 

 ganization in one sex indisputably intended for the 



sole use of the other. 



I am, &c. 



* Phil. Trans. 1799, 137. See above, p. 159, \'. iicre, by mistake, these 

 ideas are attributed to the Into John Hunter. 



