resemble Insect larve that little can be said 
concerning them in addition to what the reader 
will find elsewhere stated. (See articles An- 
NELIDA, Crustacea, Aracunipa, LNsEcrTa.) 
The antenne upon the head, which are in- 
variably two in number, correspond in all 
essential circumstances with those met with in 
Insects, and doubtless perform the same func- 
tions. The eyes when present, which is not 
the case in all the genera, exhibit the form of 
_ simple ocelli congregated upon the head, and 
arranged in lines or triangular patches ; but in 
no case do they exhibit the appearance of a 
really compound eye, such as is possessed by 
ey of Insects in their perfect state. 
_ With respect to the other. senses, touch, taste, 
and smell, but little is known except by conjec- 
ture, and presuming them to exist we can only 
suppose them to be conferred in the same 
Manner as in the real Insect. 
_ Generative system.—A remarkable difference 
_ exists between the Chilognatha and the Scolo- 
‘pendroid Centipedes with respect to the posi- 
_ tion of the organs of generation. In the former 
the external openings, both of the male and 
female genitals, are situated near the anterior 
extremity of the body, as is the case among 
the Annelida; whilst in the Chilopodous 
‘genera, which exhibit a higher grade of organi- 
gation, the generative apertures are found in 
_ the caudal segment as in the Insects. 
_ In Lithobius the structure of these parts is 
in both sexes very simple. In the male there 
_ are three long and convoluted secreting tubes 
_ resembling the simplest form of the testis in 
___ Insects, wherein, doubtless, the seminal fluid 
_ iselaborated. These are united at their termi- 
‘nations so as to form a kind of common recep- 
tacle, from which two tubes proceed to the 
root of the intromittent organ, at which point 
___ theyare joined by four smaller auxiliary vessels, 
__ which seem to take their origin in masses of 
_ fatty substance. The penis is a horny cylin- 
_ drical tube that can be protruded from beneath 
_ avalvular plate which covers the anal orifice 
(fig. 309, “ss 
_ he female apparatus consists of a single 
_ Sacculated ovarium, occupying the mesian line 
of the body. From this proceeds a narrow 
_ €xeretory duct, which, however, prior to its 
termination beneath the anal segment becomes 
_ considerably dilated into a cavity that has been 
_ improperly named uterus. Here it receives 
bo bead 
__ two sets of supplementary vessels, the one a 
t of wide ceca, the other composed of four 
_ €onvoluted vessels apparently destined to secrete 
bo og additional covering to the eggs before 
their extrusion. The female generative orifice, 
ituated in the anal segment, is covered with a 
late and furnished with a pair of small 
ny forceps calculated to assist in copulation. 
_4the male generative organs of Scolopendra 
‘present a very peculiar structure; but these 
we have already described elsewhere (see Gr- 
| NERATION, ORGANS OF). 
_ The male generative organs of Julus (fig. 314, 
A) are two elongated and partially convoluted 
tubes placed side by side beneath the alimentary 
‘canal immediately above the nervous system. 
MYRIAPODA. 
551 
The excretory ducts or terminations of these 
tubes run towards the anterior part of the body, 
where. they terminate in two organs of intro- 
mission (a), which pass out at the under surface 
Fig. 314. B 
A 
of the seventh sec- 
ment by distinct ori- 
fices behind the se- 
venth pair of legs. 
Posteriorly they ex- 
tend backwards as far 
as the middle of the 
colon. In the ante- 
rior third of their 
course they lie close 
A» together, but after- 
wards separate, be- 
come smaller, and have developed from their 
sides at short distances a number of minute 
glandular ceeca, or transparent vesicles (c), which 
doubtless constitute the secreting portions of 
the apparatus or proper testes of the animal. 
The two efferent ducts, whereby the secretion 
of these ceca is conveyed out of the body, 
inter-communicate freely by short transverse 
j 
canals (fig. 13, dd), and from the sacculated 
