48 
Dr. G. J. Hinde on Eadiolaria from the 
be of an equally close character throughout the test, the inter- 
spaces are very minute, showing sometimes as minute circular 
pores about *005 millim. in diameter, sometimes as sinuous 
apertures. Surface usually smooth and even, occasionally 
with minute spines. Diameter of test ranging from *15 
to *24 millim. 
Distribution *. Abington, Lanarkshire; Broughton, Har- 
tree Hill, Peeblesshire. 
Genus Spongoplegma, Haeckel. 
Liosphaerida forming a sphere of spongy framework, which 
encloses in the centre one single latticed medullary shell. 
(Chalk Rep. part i. p. 89.) 
Spongoplegma priscum, sp. n. (PI. III. fig. 2.) 
The surface of the cortical shell relatively smooth, with 
apparently regular apertures, the reticulate or spongy frame- 
work between the cortical and the medullary shell with circular 
or irregular apertures about ’01 millim. wide ; the medullary 
shell well marked by its closer and denser structure. The 
specimen figured is shown in section. Diameter of cortical 
shell T5 to ’2 millim., thickness of shell *012 millim. ; width 
of medullary shell *075 millim. 
Distribution . — Hartree Hill, Kilbucho, and Broughton 
Heights, near Broughton, Peeblesshire. 
Genus Diploplegma, gen. nov.f 
Liosphserida with a relatively large inner (cortical ?) test of 
irregularly reticulate or spongy framework and an outer shell 
of the same structure, the two connected by radial bars. In 
this genus the inner test is sufficiently large to be regarded as 
an inner cortical shell, and in this respect it resembles Lio - 
sphcera , Haeckel ( c Challenger ’ Report, pt. i. p. 76), which 
has two cortical shells. It differs from Liosphcera, however, 
in the irregularly reticulate or spongy nature of the tests. 
Diploplegma cinctum , sp. n. (PI. III. fig. 10.) 
Surface of outer test uneven, but without definite spines. 
The inner test connected by numerous short radial bars with 
* As all the specimens are from the same geological horizon (Llandeilo- 
Caradoc) referred to in the previous part of the paper, it is not necessary 
to indicate it in connexion with each species, 
t Xoof, double, TrXiyfia, network. 
