W. Nicoll 
373 
by then the parasites were in a macerated condition. As a consequence 
the majority had lost all trace of spines but several showed remnants 
of the cuticular spines with a few cephalic spines. 
Most of the specimens had died in an abnormally extended condition 
and many of them were so greatly etiolated that they presented the 
appearance of mere threads. On that account no attempt will be made 
here at a description which at best could be only conjectural and mis¬ 
leading. Sufficient details were available however to satisfy me that 
the species is distinct from any of the already known species of the 
genus. 
Genus LECITHOCHIRIUM Liilie. 
Lecithpchirium dillanei n. sp. 
(Plate VIII, fig. 3.) 
A single specimen of this species was taken from the alimentary 
canal of an unidentified sea-snake {Distira sp.). It was a small, dark-red, 
somewhat elongated Trematode measuring about 2 mm. in length. It 
was somewhat flattened in preserving and the maximum breadth of 
the preserved specimen is 0-78 mm. The cuticle especially in the posterior 
part of the body was thrown into numerous irregular folds or wrinkles. 
The appendix was entirely retracted within the body, appearing as 
a series of irregular folds. Its length in the retracted state is 0-65 mm. 
The subterminal oral sucker measures 0-17 mm. The ventral sucker, 
which is situated at a distance of 0-7 mm. from the anterior end, measures 
0-46 X 0-51 mm., so that its diameter is approximately three times that 
of the oral sucker. 
The pharynx is contiguous with the oral sucker and measures 
0-1 X 0-08 mm. There is no oesophagus; the intestinal diverticula 
diverge widely and passing along the sides of the body become obscure 
beyond the uterus. 
The testes lie close together immediately behind the ventral sucker. 
Of irregular oval outline they measure 0T3 x OT mm. The “cirrus- 
pouch,” which lies immediately in front of the ventral sucker and 
extends forwards to the posterior border of the pharynx, is a weak- 
looking sub-globular structure with a diameter of about 0-23 mm. Its 
internal structure was somewhat indistinct. The external vesicnla 
seminalis could not be seen. What appeared to be the pars prostatica 
was a narrow tube passing obliquely through the pouch and entering 
a dilated, almost globular, terminal portion, having a diameter about 
half that of the pouch. 
