14 PERMIAN FOSSILS. 
incurrent canals. The figure of this Sponge is reduced to half the size of the original 
specimen. 
Mr. KE. W. Binney, to whom I have much pleasure in dedicating this Sponge, has 
obtained several examples from the Red Marls at Bedford, ten miles west of Manchester, 
where it appears to be not uncommon. 
Genus Bothroconis,’ King. 
Diagnosis—A creeping sponge. Surface pitted. bres irregularly reticulated. 
Excurrent openings minute. Type, Bothroconis plana, King. 
Being unacquainted with the chemical composition of its skeleton, I have nothing 
to offer regarding the affinities of this genus, except the suggestion, that it may be 
related to the Conis’ of Mr. Lonsdale. 
BoTHROCONIS PLANA, K?ing. Plate II, figs. 7, 7a. 
Diagnosis.—A flat, wide-spreading Bothroconis. Pits cup-shaped, one sixteenth of 
an inch in diameter. Interstitial areas a little less than the pits in width. 
The specimen from which figures 7, 7a, have been taken, is spread over an irregular 
surface about six inches in diameter, but owing to long exposure to atmospheric and 
other abrading influences, it is only in a few hollow, and consequently less exposed 
parts, where the characters are preserved with any distinctness. The magnified 
representation under figure 7a, Plate II, exhibits the regularly-margined, cup-shaped 
pits (z); and the irregularly-reticulated intervening areas, furnished with pores (4), 
which I am strongly disposed to regard as openings of the excurrent canals. This 
species appears to be related to the larger Mydnopora (2) cyclostoma of Phillips, (vide 
Geol. Yorksh., vol. u, pl. ui, figs. 9, 10.) 
I have only been able to find this interesting Sponge in the Shell-limestone at 
Tunstall Hill.’ 
' Etym. BoOpos, fovea ; and xéms, pulvis. 
2 The Quarterly Journal of the Geological Society, vol. v, pp. 55-66, June, 1848. 
° Mr. Jones informs me that he has found in the Shell-limestone of Tunstall Hill a minute Sponge (’), 
globular, and irregularly pitted, of about 1, inch diameter. 
