76 THE LINGULIDZ OF THE QUEENSLAND COAST. 
positions similar to those of L. anatina, the ovary being 
pale brownish and the spermary whitish or faintly pinkish.. 
The glandular portion of each nephridium is flattened. 
and brightly coloured—red brown to deep orange—especially 
towards the nephrostome, shading into a pale yellow towards. 
its outer opening (text-figures 3 and 4). This coloured. 
part can be readily seen through the valves in most specimens 
the colour persisting in specimens which had been over two 
years in alcohol and formalin. In L. anatina it is marked by 
dark maroon lines (Morse p. 361). In one of our specimens,, 
a young adult, a few deeper coloured longitudinal lines were: 
noticed, but whether they were merely accidental folds. 
or not we are unable to say. There is a sharp line of demar- 
cation between the coloured glandular nephridium and its 
colourless nephrostome, a deep constriction separating the 
two. The latter, which is about a millimetre in diameter,. 
in a specimen 35 mm. long, is intermediate in form between 
those of L. anatina and L. lepidula as figured by Morse 
(pl. 54, fig. 11; pl. 55, fig. 1). The margin is simple and 
the rim is bent over outwardly, one part of the rim being 
confluent with the body wall. The vessels in the wall 
of the nephrostome stain readily with hematoxylin. 
A characteristic difference between ZL. bancrofts and 
most other species whose anatomy is known, relates to the 
form of the perivisceral coelome as seen when either valve 
is removed. If one compares its shape (figs. 2 and 3 and 
text-figure 1) with the figures of Z. anatina (King, figs. 1 
and 2; Gratiolet, fig. 11; Hancock, pl. 64, figs. 1 and 2 
=L. murphiana) and L. affinis (Hancock, pl. 66, fig. 1), 
it will be noted that the portion of the body cavity lying 
posteriorly to a line joining the insertions of the oblique 
muscles is greatly narrowed in the two species referred to, 
particularly when viewed from the dorsal surface. Con- 
sequently the oblique muscles and the nephridia lie in a 
wide celomic bay. In L. bancrofti the sides of the body 
wall do not project inwards to the same degree, the curvature 
being much more gradual. In this respect it is rather like 
L. lepidula where it is almost circular according to Morse. 
In the Burnett species it is a short oval if viewed in its mid 
