440 DE. G. J. HINDE ON NEW FOSSILS [Aug. 1 896, 



I propose to name it P. constipatus, from the crowded disposition of 

 the spicules in the fibres. The only specimen as yet found was 

 collected many years since by Mr. John Rhodes from calcareous 

 shale under Woodocrinus-limestone (Yoredale Series) at Thringle 

 Scar, north of Gill Wood, above the Main Limestone, ^ mile north 

 of Throstle Gill and 6 miles north-west of Eichmond, Yorkshire. 

 I desire to express my thanks to Mr. Rhodes for the opportunity 

 of describing this interesting form. 1 



II. 0» PaL^ACIS HTJMILIS, SP. NOV., A NEW PERFORATE CORAL, WITH 



Remarks on the Genus. (PL XXIII. figs. 1-18.) 



From the Carboniferous Limestone and shales exposed on the 

 banks of the River Hodder, near Stonyhurst College, Lancashire, 

 the Rev. G. C. H. Pollen, S.J., F.G.S., obtained a series of trilobites 

 and other fossils, including some small bodies which he supposed to 

 belong to the genus Palceocoryne, Duncan. At the request of 

 Dr. H. Woodward, 2 who described the trilobites from these rocks, I 

 undertook an examination of these peculiar bodies. Though it 

 was apparent that they did not belong to Palceocoryne, I could not 

 at first recognize their relationship to any other organism, and it 

 was not until after repeated study at different intervals that it 

 occurred to me to compare them with specimens of Palceacis cunei- 

 formis 3 (Haime), M.-Edw., which I had myself collected many 

 years previously from the Lower Carboniferous rocks of Spergen 

 Hill, Indiana. It could then be seen that, though differing con- 

 siderably in general form, they were so far structurally similar that 

 they could be included in the same genus. 



In the meantime some other small dubious fossils from the soft 

 shales of the Lower Culm Measures at Codden Hill, near Barn- 

 staple, came under my notice, which, like those from the Hodder, 

 differed from anything I had previously met with. Unlike these 

 latter, however, they were only in the form of casts, and conse- 

 quently less easily recognizable. A close study of these brought 

 to light the curious fact that not only do they belong to the genus 

 Palceacis, but even to the same species as the Hodder specimens. 

 Though only casts, they serve to illustrate the structure of the 

 species, and supplement the evidence derivable from the specimens 

 which have their walls preserved. 



The specimens from the banks of the Hodder are nearly all in a 

 soft shale or mudstone, and in breaking up the rock the under 

 surface of the fossil, in the form of a St. George's cross, is almost 

 invariably exposed (PI. XXIII. fig. 1), while the upper surface, with 

 the apertures of the corallites, is covered by the matrix, and can, as 

 a rule, be seen only by grinding down the rock or removing it with 

 a needle (PI. XXIII. figs. 2 & 3). The walls retain their original 

 structure of carbonate of lime, but the interior of the calices and 



1 [Since this paper was read the specimen has been placed in the Museum 

 of Practical Geology, Jermyn Street.] 

 a Geol. Mag. 1894, p. 481. 

 3 Hist. Nat. Oorall. vol. iii. (1860) p. 171, Atlas, pi. e 1. fig. 3. 



