314 ZOOLOGY 
tozoa. The tube is narrow anteriorly, then somewhat wider, 
and finally it narrows posteriorly into a duct, and opens by it 
Fie. 179. 
A. Scutigera rubro lineata. After Buffon. 
B. Tergum and part of a second tergum of the same, enlarged to show the 
position of the stigmata, 0,0. p, Hinder margin of tergum. 
into a circular canal which surrounds the rectum, and receives 
the opening of two tubular vesiculae seminales. 
Ventrally this canal enlarges into a chamber which receives 
the ducts of two pairs of accessory glands of considerable size ; 
it opens to the exterior, on the ventral surface of the last 
segment, immediately in front of the anus. The spermatozoa 
are filiform. 
The ovary is a single tube, dorsal to the alimentary canal, 
and reaching as far forward as the head, it is continuous with 
the oviduct; this divides into two branches, one of which 
passes on each side of the rectum, and the two unite again in 
a chamber which, like the corresponding structure in the male, 
receives the secretion of two pairs of accessory glands. <A pair 
of hollow vesicles, the receptacula seminis, also open into this 
median chamber. The latter opens to the exterior just in 
front of the anus, the opening being provided with a pair of 
minute jointed claws. 
The exotic species of Scolopendra may attain the length of 
six inches, and their bite is extremely painful,and even dangerous. 
Cryptops and Geophilus have no eyes: the latter possess a great 
