554 REPORT OF COMMISSIONER OF FISH AND FISHERIES 
EXPLANATION OF THE PLATES. 
The following letters have the same significance in all figures: 
c. m. circular muscles. 
g. c. duct of germ gland. 
g. g. germ gland. 
l. longitudinal aquiferous vessel. 
m. longitudinal muscles. 
n. c. marginal nerve chord or ves- 
sel. 
n. g. nerve cells. 
o. v. oviduct. 
p. cirrus. 
s.c. subcuticular fibro-granular 
layer. 
s. g. shell gland. 
t. testis. 
u. uterus. 
v. vagina. 
v.c. duct of vitelline gland. 
v. d. vas deferens. 
v. g. vitelline gland. 
The figures are all from drawings by the author. 
Plate I. 
Fig. 1. Scolex and pseudoscolex ; a, scolex ; b, pseudoscolex ; c, anterior part of 
strobile ; X about 14. From a stained alcoholic specimen. 
Fig. 2. Detail of pseudoscolex, superficial view, X 27. 
Fig. 3. View of another portion of same, X 27. 
Fig. 4. Face of bothrium, viewed from the front so ^hatthe posterior part is slightly 
foreshortened; from alcoholic specimen, X about 60. 
Fig. 5. Scolex and pseudoscolex of small specimen, from life, much enlarged ; a, 
anterior loculus ; b, hooks; c, posterior loculus; d, neck; e, pseudoscolex; 
f, anterior part of strobile. 
Fig. 6. Front view of bothrium, from life, much enlarged. 
Fig. 7. View of top of scolex and pseudoscolex, of large specimen, about one-half 
of the latter shown in sketch. Outline of pseudoscolex, X about 14 diame- 
ters ; scolex, x 15. From stained alcoholic specimen ; a, scolex. 
Plate II. 
Fig. 8. Transverse section of scolex near apex through anterior loculi, X about 225. 
Picro-sulphuric preparation stained with Beale’s carmine; b, loculus of both- 
rium; to, cut ends of longitudinal muscles. Nerve cells mainly central. 
Fig. 9. Detail of transverse section through \yall of bothrium, X 750. 
Fig. 10. Transverse section through posterior loculi of bothria, X about 200 -f-J h 
longitudinal vessels of water- vascular system, nerve cells no longer cen- 
tral as in fig. 8. 
Fig. 11. Transverse section immediately back of scolex, X about 225. V, branch of 
longitudinal aquiferous vessel entering cervical outgrowth of pseudoscolex ; 
to, cut ends of longitudinal muscles. The nerves are here collected into 
the two marginal chords or vessels, n. c . n. c. 
Fig. 12. Longitudinal section of bothrium, X about 225. b, anterior, b', posterior 
loculus. 
Fig. 12a. Bothrium treated with caustic potash, X 80. Front view. 
Fig. 12&. Bothrium treated with caustic potash, X 80. Side view. 
Fig. 13. Hook, optical section, showing the closely packed epithelial cells of which 
it is composed, from longitudinal section of bothrium, X 450. 
Fig. 14. Longitudinal section of apex of scolex, showing central nerve mass, and 
vessels of water-vascular system ; b, b, anterior loculi, X 450. 
Fig. 15. Longitudinal section of apex of head showing nerve cells and longitudinal 
vessel of water-vascular system, section more nearly central than fig. 14, 
X 450. 
All the figures of plate ii, with the exception of 12a and 12&, made from 
picrosulphuric preparations stained with Beale’s carmine (ammonia). 
The plates here numbered 1 to VII follow page 556 and are there 
numbered LXI to LX VII. 
I 
