440 MESSRS. F. M. BALFOUR AND W, N. PARKER ON THE 
Fig. 58 B. Inner aspect of the posterior lobe of the testis from the same example, to 
show the \ as a efferentia forming a network on the face of the testis. 
Figs. 59 A and B. Two sections showing the structure and relations of the efferent 
ducts of the testis in the same example. 
Fig. 59 A. Section through the inner aspect of a portion of the testis 
and mesorchium, to show the netw T ork of the vasa efferentia 
(ii.v.e) becoming continuous with the seminal tubes (s.t.). The 
granular matter nearly filling the vasa efferentia and the 
seminal tubes represents the spermatozoa. 
Fig. 59 B. Section through part of the kidney and its duct and the 
longitudinal canal (l.c,) at the base of the mesorchium Canals 
(s.c.) are seen passing off from the latter, which enter the 
kidney and join the uriniferous tubuli. Some of the latter 
(as well as the seminal tubes) are seen to be filled with 
granular matter, which we believe to be the remains of 
spermatozoa. 
Fig. 60. Diagram of the urinogenital organs of the left side of an adult female 
example of L&piclosteus 100 centims. in length. This figure shows the 
oviduct (pd.) continuous with the investment of the ovary, opening at odd. into 
the dilated part of the kidney duct (segmental duct). It also shows the 
segmental duct and the junction of the latter with its fellow of the right 
side to form the so-called bladder, this part being represented as cut open. 
The kidney ( k .) and lymphatic organ (ly.) in front of it are also shown. 
PLATE 27. 
Fig. 61. Transverse section through the developing pancreas (p.) of a larva 11 millims. 
in length. 
Fig. 62. Longitudinal section through portions of the stomach, liver, and duodenum 
of an embryo about a month after hatching, to show the relations of the 
pancreas (p.) to the surrounding parts. 
Fig. 63. External view of portions of the liver, stomach, duodenum, &c., of a young 
Fish, 11 centims. in length, to show the pancreas (p.). 
Fig. 64. Transverse section through the anterior part of the trunk of an embryo, 
about a month after hatching, showing the connexion of the air-bladder with 
the throat ( a.b '.). 
Fig. 65. Transverse section through the same embryo as fig. 64 further back, showing 
the posterior part of the air-bladder [a.b.). 
