184 Dr Greville’s Descriptions of New Genera 
Hab.—Curteis Straits, Queensland. 
A. most distinct species, and attractive from the graceful 
manner in which the wings intersect one another. The 
primary wing makes a concave sweep from the rounded 
corners, and touches the central portion at the nodule. I 
have not been able to detect the strie in this part. The 
supplementary wing makes a sweep in the opposite direc- 
tion, intersecting the primary one at two points, and is so 
constricted in the middle that the nodule lies in the angle, 
and appears to serve both wings. The striz in the supple- 
mentary wing are conspicuous. 
Amphiprora Kiitzingiana, n. sp., Grev.—Front view 
broadly and rectangularly oblong, truncate at the ends, with 
widely rounded corners, and somewhat straight sides, sud- — 
denly and deeply constricted; supplementary wing com- 
mencing obliquely at the ends, then forming a swelling 
curve, which keeps within the margin, and passes down to 
the nodule, where it appears to be fixed; central portion 
with point longitudinal lines; strie obscure. Length :0050". 
(Plate IV. fig. 6.) 
Hab.—Curteis Straits, Queensland. 
Panduriform and lyre-like in its general aspect, partly 
from its shape, and partly from the peculiar curve of the 
supplementary wings, and the longitudinal lines of the cen- 
tral portion. In this, as well as in the preceding species, 
the supplementary wing does not form a single curve as 
usual, in passing either within or beyond the angle of the 
constriction, but is itself constricted, and in the present in- 
stance very nearly follows the curve of the primary wings 
as they approach the nodule. I have not been able to re- 
solve the striz in any part of the frustule. 
Amphiprora Meneghiniana, n. sp., Grev.—Front view 
broadly subrectangular, the ends truncate, wings widely 
rounded at the corners, with a wide and rather deep con- 
striction ; supplementary wings narrow, convex, widely and 
very slightly concave opposite the nodule; all the wings 
striate, strie about 15in 001". Length 0045". (Plate IV. 
fig. 7.) 
Hab.—Curteis Straits, Queensland. 
A very fine strongly margined species, with both primary 
