il 
434 SIR WILLIAM TURNER ON PENNELLA BALZAANOPTERA. 
Fig. 28. A transverse section a little above the genital openings. Striped muscles are attached by 
distinct tendons to the outer wall of each receptaculum. 
x 9. 
p. 426. 
Figs. 29, 30, 31. Three transverse sections in succession from above downward in proximity to the 
genital openings. They show the receptacula, each containing a plug of cement. In 29 is also seen the 
short canal of the receptaculum which leads to the genital opening; and in 30 the opening itself is visible 
with a plug of cement protruding through it. 
Fig. 32. Transverse section through the upper part of the caudate abdominal segment. The origin of a 
pair of bristles is seen and the pair of ova strings lie ventrally to the segment. x 13, 
Lettering of Plates II., IIL, IV., the figures in which are reproductions by Messrs M. & T. Scorr 
of photographs of sections through Pennella. 
A. Alimentary canal. 
ar. Areolated tissue, 
C. Cement gland. 
c.d. 5 duct. 
Ch. Chitin. 
D. Dorsal space. 
g. Esophageal nerve ganglion, 
g.o. Genital opening. 
m. Mesentery. 
n.m, Non-striped sphincter muscle. 
n. Nerve cells. 
O. Ovary. 
oa. Ova. 
. Oviduct. 
. C&sophagus. 
. Oral cleft. 
. Ova string. 
. Pinnate bristles. 
. Pigmented lining membrane. 
. Receptaculum. 
. Striped muscles. 
. Tubercles. 
. Ventral space. 
