SCHIZODUS ANTIQUUS. 225 



Green Wood, Hebden Bridge, and Pule Hill, Yorkshire ; in a bed of ferruginous 

 grit, Pule Hill, Millstone-grit series. 



Lower Coal-measures : roof of Bullion Mine, Carre Heys, Colne, Lancashire ; 

 above the Gin Mine Coal, Longton, and the 4-foot coal, Wetley Moor, North 

 Staffordshire Coal-field. 



Observations. — This species is founded on several specimens which have been 

 collected from the localities mentioned above. One shell (PI. XIX, fig. 4) from 

 the Manchester Museum, Owens College, is labelled in Capt. Brown's writing as 

 Sanguinolaria axiniformis from Todmorden. I cannot find any printed notice of 

 this name, and am unable to retain the specific term on accouut of it having 

 been already applied by Phillips to a species of the genus. The locality, 

 Todmorden, is somewhat misleading, for the majority of the specimens collected by 

 the late Mr. Gibson, and now in the Geological Collection of Owens College, came 

 from High Green "Wood and Horsebridge Clough, a mile or so north of Hebden 

 Bridge. The specimens from Pule Hill were discovered by Messrs. Barnes and 

 Holroyd, who figured one example (op. sup. cit.) under tbe name of Schizodus 

 Salteri, for up to the present it has been thought that this species, which occurs 

 in the Calciferous-sandstone series of Fife, survived into Coal-measure times in 

 Central England. The species are quite distinct ; 8. Pentlandicus, under which 

 name the Fifeshire shell is now described, for reasons of priority, is more trans- 

 verse and more regularly quadrate. Judging from the figure I suspect that the 

 Cytherea antiqua of Brown (op. sup. cit.) is a young example of the species under 

 description. 



Unfortunately the casts (figs. 24 and 25, PI. XVIII) from the calcareo-ferru- 

 ginous grit at Pule Hill are not perfect, and the dorsal slope is not visible in 

 fig. 24 ; but, from what I know of the relation of the shape of the internal cast to 

 the complete shell in this genus, I do not think that there is much doubt that they 

 really belong to the species. Mr. Wild described and figured a very small 

 example from the roof of the Bullion Mine, Carre Heys, Colne, as Anthracosia, new 

 angular species. This I figure (PI. XIX, fig. 6) and consider may be a young 

 example of S. antiqua. 



This species, though it seems to have a fairly long distribution in time, is very 

 rare ; only few specimens have been met with at each locality. It is easily recog- 

 nised by its rounded antero-ventral contour being much less quadrate than in 

 any other form. 



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