392 
S. J. JOHNSTON. 
follicles (0‘064 mm. in diameter) grouped in two fairly com- 
pact masses. They do not extend outwards beyond the inner 
edge of the intestinal limbs, but lie fairly close together, 
one on either side of the ovary. This does not quite agree 
with Looss’ definition of the sub-family, Dotterstocke aus 
einander geriickt’^ (33, p. 863), and perhaps that definition is 
a little too narrow. The short, directly transverse yolk-ducts 
meet in a small yolk-reservoir lying ventral to the sbell- 
gland and opening into the ootype by a comparatively long 
duct. 
The coils of the uterus, never far from the middle longi- 
tudinal line, are confined laterally to the space within the 
intestinal limbs, but they extend a little further back, running 
out between the two ends of the intestine. 
The eggs are rather long and narrow, 0'052-0‘063 mm. in 
length by 0*023 mm. broad. 
Petalodistomum cymatodes^ sp. n. (Fig. 14.) 
Diagnosis. — Above middle size, petal-like in shape. Oral 
and ventral suckers equal in size. Intestinal limbs un- 
bran died but undulating. Genital pore behind the 
intestinal limbs. Testes consisting of a large number of 
widely diffused small follicles. Yesicula seminalis 
comparatively short. Ovary mulberry shaped. Yolk- 
glands, in the form of branching tubes, not extending 
outwards beyond the intestinal limbs. 
Parasitic in the body-cavity of the leopard ray, Dasybatis 
k u h 1 i i . 
Type-specimen in the Museum of the Australian Institute 
of Tropical Medicine, Townsville, Yo. T.40. 
P. cymatodes, 10*5 mm. long by 8 mm. broad, is a good 
deal larger than its congener, but resembles it in shape. The 
oral and ventral suckers are about the same size, I'14 mm. in 
diameter. The pharynx, which is obviously contracted in its 
longitudinal axis, measures 0*293 mm. by 0*538 mm. wide. 
KvfjLaTwdrjc, abounding in waves, referring to the intestinal hnibs. 
