450 J. W. Jackson — Mollusca, Coal-meaiiures, Lancashiye. 



fragments from the Coal-measures of Madeley, Salop, and from the 

 Pendleside Series of the Vale of Todmorden ; Pleuronaiitilus falcatus 

 and Temnocheilus carbotiarius by specimens from Coalbrookdale. 



Regarding the two species of Coelonautihix, one of Wild's specimens, 

 as lias been shown above, was originally figured as Nautihis suhsulcatus 

 and remained in our collections under this name until recently ; it 

 has since been determined as a new species of Temnoclieiliis. 



The inclusion of C. quadratus as a Coal-measure fossil (though 

 recorded from Coalbrookdale) induced me to carefully look over our 

 collections, with the result that I discovered a specimen in the 

 " Kay-Shuttleworth Collection" labelled and registered as this species 

 and as coming from the "Lower Coal-measures, Burnley". An 

 examination, however, of the matrix, which is a black limestone, 

 convinced me that some mistake had been made in the horizon of this 

 fossil. In order to verify the identification of the species I submitted 

 the specimen to Mr. G. C. Crick, who kindly determined it as 

 follows: '■' Cmlonautihis aff. quadratus. Has some resemblance to 

 C. gradus, Foord, but seems to come nearest to C. quadratus 

 (J. "Fleming)." At the same time he identified two other species on 

 the same slab. These associated species are Prolecaniies serpentimis 

 and Glyphioceras crenistria. I have since exposed a specimen of 

 Posidoniella IcBvis and what looks like the anterior end and umbo of 

 a Lamellibranch which is very reminiscent of a Silui'ian Grammysia. 



Dr. W. Hind has also seen the specimen, and remarks that it is 

 "not unlike one of the bands of the Great Limestone of Weardale 

 where Ccelunautilus quadratus occurs". Questioned further as to its 

 probable Pendleside age, he says "the group suggests a lower horizon 

 than Pendleside, though Posidoniella Icevis would point to a Pendleside 

 horizon". He quite agrees with me in thinking "not Coal- 

 measures", but considers, like myself, "Black Hall, Bolland " as 

 a possible locality whence the specimen was originally obtained. Two 

 of the species, Prolecaniies serpentimis and Posidoniella Icevis, have 

 already been recorded from the Pendlesides of that place [4], but the 

 two other species are new to the list. 



Pleuronautilus ptdcher, Crick. — The Manchester Museum recently 

 obtained a ISTautiloid from Mr. D. M. S. Watson, who collected it 

 from the Lower Coal-measures at Stalybridge, its horizon being " over 

 the 1st coal ". This specimen, whicli is an immature shell displaying 

 the sutures very clearly, has been examined by Dr. Hind and 

 Mr. Crick and pronounced to be Pleuronautilus pulcher, Crick. This 

 discovery is interesting, as hitherto the species has only been recorded 

 from the Pendleside Series near Hebden Bridge [5], and from the 

 North Staffordshire Coal-field: 71 feet below the Four-feet Coal, 

 Cheadle [6, p. 541, pi. xxxvi, fig. 3]. 



Glyphioceras aff. reticulato (J. Phillips). — Up to the present time 

 the only record for Glyphioceras reticulatum in the Lancashire Coal- 

 measures appears to be that given by Hull [7] * as follows : 

 •' Goniatites reticulatus, Phill. Above Lower Lomax, Bury (just 

 beyond tlie north-east edge of 1 inch map), opposite Broad Oak 

 Mill. Above Gannister Coal." 



^ Eeferred to later by Bolton, Hind, and Crick. 



