240 
Dr. Kidd on the 
The brain differs in colour from the ganglions, being of a 
pale brownish pink, instead of a cream colour, and in size it 
far exceeds the largest of the ganglions. It consists of two 
hemispheres, separated by a fissure, from each of which pass 
out four processes ; the first of these processes unites as 
above described, with a process from the ninth ganglion, to 
form the nervous collar of the esophagus ; the second passes 
to the root of the antenna; the third, which may be called the 
optic nerve, passes towards the inner surface of the cornea ; 
and at its extremity swells out into a fringed coronet of an 
orange red colour ; the fourth process, the extremity of which 
is also of an orange red colour, proceeds to the ocellus or 
stemma of the corresponding side. 
The upper surface of the brain is covered by a mass of 
soft substance somewhat resembling loose fat. 
The sexual organs of the female.* These organs consist of 
two ovaries, which occupy a considerable portion of the 
upper part of the abdomen, and terminate by a narrow duct 
in a common cavity or uterus, which opens externally under 
the posterior edge of the last segment but one of the ventral 
surface of the abdomen. Behind the uterus is an oblong 
white body, Avhich originating from a cul de sac, and then 
doubling on itself in the form of a slender' tube, terminates 
in the uterus. The contents of this body resemble a thin 
white paste. The ovaries are irregularly pear-shaped, and 
consist of a transparent membrane irregularly convoluted, 
through which the ova, enveloped in a gelatinous medium, ' 
are easily distingushed. In the same ovary the ova are fre- 
quently of different sizes and colours ; those which are the 
♦ Vide fig. 13. 
