52 
Dr. G. J. Hinde on Radiolaria from the 
test. Diameter of sphere *09, of inner test *03 ; length of 
spines ’075, basal thickness *01 millim. 
Distribution . Hartree Hill, Kilbucho, Peeblesshire. 
The genera described below, though embraced in the same 
suborder — Sphseroidea — as the preceding forms, do not find 
a place in any of the families of this group, as described by 
Haeckel in the i Challenger ’ Report. They may possibly 
represent new families ; but as their condition of preservation 
and mode of occurrence are very unfavourable for a thorough 
determination of their structural characters, I do not propose 
to define their position in Haeckel’s system, but shall limit 
myself to giving generic and specific descriptions, so far as 
these can be ascertained. 
Genus Doryspelera *, gen. nov. 
Sphaeroidea with simple spherical lattice-shells and a single 
radial spine extending from the surface of the test. No 
medullary test. 
Fossil forms of this genus have been already figured by 
v. Dunikowski from the Liassic strata of Schafberg, but no 
name was given to them, possibly under the idea that they 
were imperfect specimens of forms with normally two or four 
radial spines. In this Ordovician chert, however, specimens 
with but a single radial spine are not at all uncommon, and 
they may be regarded as being in their original condition. The 
genus Lithapium f, Hseckel, has a simple lattice-shell, with 
only a single radial spine ; but it is ellipsoidal or pear-shaped, 
and thus is included in a different suborder. 
Dorysphcera reticulata , sp. n. 
(PI. III. fig. 3, PI. 1Y. fig. 3.) 
The framework of the shell thin, of an open, subpolygonal, 
reticulate character, the meshes unequal in size, subcircular 
to subpolygonal. Radial spine short, styliform. Diameter 
of sphere T8, meshes from *005 to *015 millim., thickness of 
framework about *005 millim. Radial spine (probably im- 
perfect) *07, breadth of base *01 to *02 millim. 
Distribution . Abington, Lanarkshire ; Broughton Heights, 
Peeblesshire. 
* dopv, a spear, crfpaipa , sphere, 
t 6 Challenger ’ Rep. pt. i. p. 303. 
