NOTKS OX TI[E HISTRIOUDKLLID.K. 
219 
by a narrow, but distinct, fissure. In the female tlie nerve- 
cord is much compressed in the fifth segment, in which the 
single mature ovum is formed. In the male, in a correspond- 
ing position in the fifth (or second repi’oductive) segment, the 
cord bends away from the ventral surface and passt?s on the 
dorsal side of the vasa deferentia and penis to resume its 
ventral position behind them. The fifth ganglion, the last of 
the trunk, gives off nerves to the cirri of the third pair. The 
connectives following this are very short and are in close 
apposition : they correspond in position to the partition 
between the trunk and the tail. In the tail region are a 
series of rather small ganglia which are in very close apposi- 
tion, the intervening connectives being very short and in a con- 
tracted specimen scarcely distinguishable. These five small 
ganglia correspond to the five imperfect segments into which 
this region is divided by slight external transverse constric- 
tions. Each of these ganglia has connected with it laterally 
a pair of small ganglia corresponding serially with the lateral 
ganglia in the segments of the trunk. Posteriorly the nerve- 
cord divides into two branches, one passing into each 
posterior limb, each giving off a branch to the corresponding 
limb-cirrus. 
Reproductive System of Female.^ 
S. n ovie-hollandias has a pair of extensive vitelline 
glands (figs. 7-9, vit.) corresponding to those of S. tasma- 
nicus (6, p. 322, hg. II, vit.) These are a pair of irregularly 
shaped masses, of deeply staining protoplasmic material, partly 
divided into several elongated narrow lobes, without cell- 
boundaries, but with nuclei at irregular intervals. They are 
dorsally situated in close relation to the dorsal bundles of 
longitudinal muscular fibres, and they extend from a point 
just opposite the second cirrus throughout the greater part 
of the length of the genital segments, each entering tlie 
corresponding ovary and terminating in a leash of slender 
' I have nothing to add to the account previously given by me of the 
male reproductive apparatus. 
