210 
Calliohdella lophii 
the border of the mouth part and the oesophageal part of the 
alimentary canal and includes the pharyngeal sheath down to its con¬ 
clusion. After the pharyngeal sheath leaves the oesophagus it runs, 
not as in other genera freely inside the ventral sinus, but in front of the 
oesophageal ring, and follows along with a connective tissue sheath 
which surrounds the pharyngeal sheath to its conclusion, separated 
Fig. 3. The reproductive system of Calliohdella lophii viewed from the ventral surface. 
t. testes, Ov. ovaries, v.e. vasa efferentia, v.d. vasa deferentia, d.e. ductus ejaculatorii, 
h. bursa, p. penis, Od. oviduct, m.g. male genital aperture, f.g. female genital aperture, 
v.s. vesiculae seminales. 
(For the sake of the diagram the testes are too close together, below/.g. the proportion 
is not kept. For relative scale see Fig. 2.) 
Fig. 4. Diagrammatic lateral view of the alimentary canal, pli. pharynx, ph.s. pharyngeal 
sheath, St. stomach, c. caecum, Int. Intestine, m. mouth, a. anus. 
