159 
(fig. 13 /?) goes as the inner one from one segment to the other. 
It gets much narrower posteriorly, is bent inwards in the second 
to the fourth segment and is divided into two branches in the second 
segment. Where these two branches are fastened in front, I was not 
able to see; the band seems to terminate in the ninth segment. 
The following system of lateral and partly ventral muscles has 
no connection with the two longitudinal dorsal bands. In front, 
behind the genital opening there are some muscles which are well 
separated from each other. below but more united above (fig. 13 1); 
behind these there is a foremost narrow and a hindmost broader 
band, each consisting of one muscle; these two bands are well 
separated from each other below, but above they are united with 
each other and with several other bands (fig. 13 t?). Behind these 
there are six transverse lateral bands of which the three first at 
least consist of two muscles below, å short one directed forwards (m!) 
and a longer one directed backwards (m?) and besides two above 
directed backwards and in prolongation of each other (m? and m?). 
Where the dorsal and ventral parts aré united there arises a muscle 
(m3) which is extended to the muscular spots where the two dorsal 
muscles (m? and mt) of the preceding transverse band are meeting, 
and between the last mentioned muscular spots and the upper tip 
of the: preceeding band (m?) a similar transverse muscle (m&) is 
extended. In the first transversal band it is difficult to unravel 
this structure above on account of the very short muscles and the 
number of those arising here. The upper connecting muscle (mé) 
between the third and fourth transverse band is missing. The 
" fifth and sixth band have neither communication with each other 
nor with the fourth band, and the upper muscle (m?) of the dorsal 
portion is missing. The hindmost .ventral muscles of the first and 
second transverse band are connected with each other and with the 
short band in front by a thin ventral longitudinal band (ty 
. The upper dorsal muscles (m5) of the first four bands are 
connected with a longitudinal muscle (m”) that is very narrow 
between the third and fourth band. Besides the three first bands are 
