152 Macteay MemortaAt VOoLuMe. 
Fig. 21.—Cirrus and neighbouring paris of Craspedella Spencer. 7., introvert of cirrus ; e¢.s., ejaculator 
t=) fo} to} 2 L ’ 
sac; g.r., granule reservoir ; g.d., right granule duct; v.s., vesicula seminalis. 
PLATE XIy. 
Fig. 1.—Longitudinal, nearly horizontal section of 7. /asciata (Flemming’s strong solution and alum- 
cochineal). ., epidermis and cuticle ; m., longitudinal layer of muscle ; between ¢., and m., the 
’ glands ; ¢.s., posterior 
dark band represents the thickly pigmented layer; pr. pr., ‘prostate’ 
uarrow part of terminal sac of excretory system ; ¢.g., group of tentacular unicellular glands ; 
the dark bands running forwards and inwards from this are the strands of ducts; ¢., anterior, 
U., posterior testis ; in these the dark outline represents the muscular investment, and the lines 
running from this into the substance of the testes the incomplete trabecule ; 7., part of the 
ventral nerve-cord ; v.s., vesicula seminalis ; ¢., cirrus; w., uterus; 7.v., receptaculum vitelli ; 
b., points to the ventral part of the brain, with the origins of the posterior nerve-cords; in 
front of this are obliquely divided nerves and some excretory cells; the black dots and lines 
are the dorsi-ventral bundles of muscular fibres of the parenchyma, here darkly stained by the 
osmic acid ; ph., points to the lumen of the pharynx ; the various layers of muscle are not all 
clearly distinguishable here; the radial fibres are distinct ; the homogeneous-looking masses 
are sections of the anterior and posterior ‘‘sphincters”; 7., is placed in the lumen of the 
intestine ; the investing muscular layer is represented by the dark outer line, and the septa by 
the lines running inwards from this. 
Fig. 2.—Temnocephala Nove-zealandie, from a living specimen. .s., terminal sacs of the excretory 
system ; m., mouth ; ph., pharynx ; ¢., intestine ; ¢.t.4.4., testes ; 7.v., receptuculum vitelli; ov., 
ovary ; v., vagina ; ¢,, cirrus ; v.s., vesicula seminalis. 
Fig. 3.—The muscular vagina of 7. Vove-zealandice, with its teeth, as seen in a longitudinal vertical 
section. o.d., oviduct ; wt., uterus; v., lumen of vagina with the chitinous teeth ; e/., genital 
cloaca ; m.m., masses of muscular fibres. 
Fig. 4 —Section of the integument and muscular layers of 7. quadricornis. cu., cuticle ; ep., epidermis ; 
b.m., basement-membrane; c¢.m., layer of circularly disposed muscular fibres; p., layer of 
’ d ’ y E) ? 
pigmented parenchyma between the muscular layers; p’., outer part of central parenchyma 
with large rounded granules of pigment ; .m., longitudinally arranged layer of muscle, 
PLATE Xv. 
Fig. 1.—Semi-diagrammatic view of the organisation of Zemnocephala minor, the animal is represented 
as somewhat contracted ; the vitelline glands, the shell-glands and the nervous system are not 
represented. ph., pharynx ; in front of it the eyes, with a portion of the pigment-network ; 
z., intestine with its septa; ¢s., terminal sacs of excretory system; 7.g., rhabdite-forming 
tentacular glands ; r.d., ducts of the same where they become dilated ; ¢., testes ; v.s., vesicula 
seminalis ; ¢.s., ejaculatory sac; c., cirrus; g.c., genital cloaca; 7.v., receptaculum vitelli; o., 
ovary ; wt., uterus ; pr., some of the prostate or granule-forming glands (only diagrammatically 
represented), 
Fig. 2.—Ventral view of 7. Jheringii, from a preserved specimen. m., mouth; g.a., genital aperture; v., 
vitelline glands ; the other letters as in fig. 1. 
Fig. 3.—Craspedella Spenceri, dorsal view ; letters as in preceding figures. 
