304 MR. F. F, LAIDLAW ON THE [ Apr. 21, 
The penis (p.) itself is small and projects into the antral chamber 
at the upper anterior end of the latter. 
The penis is a fleshy organ, composed of longitudinal and 
circular fibres which exhibit numerous nuclei (see Plate XXIII. 
fig. 2). It is armed with a chitinous stylet. 
The base of the penis is entered by the short ductus ejaculatorius 
(d.e.) which leads to the prostate region. It turns shortly after 
leaving the penis and runs in a backward direction, so that a 
Text-fig. 51. 
Male organs of Notoplana evansii. 
For explanation of lettering, see p. 318. 
transverse section passing through the penis passed also through 
the prostate (see Pl. XXIII. fig. 2 and also text-fig. 51). | 
The prostate consists of a number, some nine in all, of small 
chambers (pr.c.) which lie about the ductus ejaculatorius and 
open into it at their distal ends. The ductus, elsewhere with 
muscular walls, here is lined only with’a very flattened epithelium, 
outside which lies a second layer of similar cells belonging to the 
