330 OBSERVATIONS ON THE 
character, as they conduce largely to the introduction 
of fictitious species, have long engaged the attention 
of arachnologists, while those arising from extra- 
ordinary organic modifications (in consequence, per- 
haps, of their less frequent occurrence) have been 
almost entirely overlooked. The importance which 
cases of the latter description possess in relation to 
physiology and systematic arrangement will be best 
illustrated by a few examples. 
1. An immature female Zhomisus cristatus had the 
two lateral pairs of eyes only; the four small inter- 
mediate ones were altogether wanting, not the slightest 
rudiment of them being perceptible even with the aid 
of a powerful magnifier. 
2. An adult female Zheridion varians was dis- 
covered to have only six eyes; the two posterior 
intermediate ones were entirely wanting, and the 
posterior eye of each lateral pair was not half of the 
usual size. 
3. The left intermediate eye of the posterior row 
was perceived to be wanting in an adult female 
Epeira inclinata, and the right intermediate eye of 
the same row was not half of the usual size. 
4. Deficiency of the right intermediate eye of the 
anterior row has been remarked in an adult male 
Lycosa cambrica, 
5. An adult female Ciniflo atror was found to 
be without the left intermediate eye of the posterior 
row. 
