842 DR. G. J. HINDE ON RECEPTACULITID®. 
thick example 20 millim. near the margins of the cup or disk. The 
rhomboidal spicular plates are from 4 to 5°5 millim in extension ; 
they are usually flattened above, though occasionally through pressure 
they become concave. ‘The horizontal rays are from 1 to 1:5 millim. 
in thickness; the distal ray not unfrequently projects from beneath 
its own plate to the centre of the plate in frent of it. The vertical 
rays or pillars vary from 1 to 2°5 millim. in thickness; they are 
usually contracted immediately beneath the horizontal rays and 
then again expand and maintain a uniform thickness to their contact 
with the inner or upper layer of the wall. The characters of 
the inner wall in this species are somewhat doubtful. According 
to Giimbel and Dames it resembles the plates of the outer wall. Its 
structure is not shown in examples which I have seen from Belgium 
and Ober-Kunzendorf, but in a Canadian example of the species 
there are regular rows of perforations as in LR. occidentalis. 
There is a considerable variation in the size of specimens of this 
species from different localities. ‘Thus the walls and spicules in the 
Belgian specimens are much less robust than in those from Ober- 
Kunzendorf. 
Quenstedt has placed some examples of this species under the 
name of L. scyphiordes, solely on account of a superficial resemblance 
to the sponge T'’remadictyon (Spongites) reticulatus, Quenst. sp. 
Mr. Champernowne has lately discovered an example of this species 
in hardened mudstones in Devonshire. It is much compressed and 
exhibits partially the inner surface. 
Distribution.—Middle Devonian:. Mudstone Bay, Devonshire. 
Chimay, Couvin and elsewhere in Belgium; Eifel, Germany; Ober 
Kunzendorf, Silesia; near Widder, Ontario, Canada. 
RECEPTACULITES OCCIDENTALIS, Salter. (Pl. XX XVII. figs. 3,3 a—m.) 
1859. Receptaculites occidentalis, Salt. Can. Org. Rem. dec. 1. 
p. 45, t. 10. f. 1-7. 
1845. Coscinopora sulcata, D. Dale Owen (non Goldfuss), Geol. 
Report, Iowa, &c. p. 25 pl. vu. fig. 5. 
1862. Receptaculites Oweni, Hall, Rep. Geol. Surv. Wise. vol. i. 
p. 46, fig. 2, and p. 429. 
1865. Receptaculites occidentalis, Bill. Pal. Foss. Can. vol.i. p. 381, 
figs. 8354-356. 
1868. Receptaculites Owent, Meek and Worthen, Pal. Illinois, 
vol. i. p. 302, t. 2. £. 3. 
1875, Receptaculites oceidentalis, Gumbel, Beitr. p. 7. 
1878. Receptaculites occidentalis, R. Etheridge, Quart. Journ. 
Geol. Soc. vol. xxxiv. p. 577. 
1878. Receptaculites iowensis, Quenst. Petref. Bd. v. p. 589, 
t. 142. f. 17. 
1880. Receptaculites occidentalis, F. Romer, Leth. Pal. vol. i. 
. 289. 
: 1882. Receptaculites occidentalis, T. R. Jones, Cat. Foss. Foram. 
Brit. Mus. p. 3. 
1882. Receptaculites Neptuni? T. R. Jones, id. p. 3. 
