Vol. 67.] FKOM THE PAJiADOXIDES BEDS OP COM LEY. 



283 



Synopsis of part of the Cambrian Rocks of Comley, showing the Positions 

 of the Fossimferoi s Horizons (in descending order). 



Shoot-Rough- ! Shale - 



Road \ Gritty flags. 



Beds. 



Hill-House 

 Beds. 



^ Sandstone. 



Unexplored interval 

 ( Shale. 

 <J Grits. 

 I Calcareous flags. 



Ortkis (Qrusia) cf. lenticular isWahl, 



Bavidis Fauna. 



Paradoxides rugulosus Corda. 



Ptychoparia (Liostracus) sp. 

 Borypyge la/cci, sp. nov. 



Quarry-Ridge f Shale. 



Beds'. I Coarse grit and conglomerate. Groomii Fauna. 



Unconformity and position of the Black Limestone. 



( The Grey Limestones. 

 Lower Comley ' The Olenellus Limestone. 

 Sandstone. , Sandstone, with occasional 

 ^ calcareous bands. 



Protolenus- Callavia Fauna. 



Description of the Trilobites. 

 Paradoxides Brongniart. 



Paradoxides groomii Lapworth. (PL XXIII.) 



C. Lapworth, Geol. Mag. dec. iii, vol. vii (1891) p. 532, footnote. 



In the above- cited paper on Olenellus callavei, Prof. Lapworth 

 gives the following preliminary description of Paradoxides groomii : — 



'In general form and size intermediate between Par. Harlani (Green) and 

 Par. Davidis (Salter). Length 8 to 9 inches, breadth 5§. Head semicircular, 

 with pointed genal spines from 2 to 3 inches in length. Glabella pro- 

 minent, clavate, more than half its length being occupied by the broadly 

 rounded and smooth frontal lobe. Hypostonia of the type of that of Par. 

 Bohemicus (Boeck). Pleurae (No. ?) falcate, and sharply pointed. Pygidium 

 a raised disc with a central tubercle ; embraced laterally by long, sabre-like, 

 distally-diverging spines. Localities — Neves Castle (Lapworth, 1889) and 

 Comley (Groom, 1890). Named after T. Theo. Groom, Esq., B.So, who first 

 collected fragments sufficient for description.' (Op. cit. pp. 532-33.) 



The type-specimens sent to me by Prof. Lapworth are to be found 

 upon four slabs of calcareous conglomerate from Comley Quarry, 

 lettered A, B, C, & D, and one piece of a rather different rock from 

 Neves Castle. Upon the slabs from Comley there are, also, several 

 examples of cranidia and pygidia of Dorypygt laJcei, sp. nov. 

 (described below, p. 287), and also two of a long, tapering Hyo- 

 lithoid shell of circular section, which I recognize as being identical 

 with other specimens that I have collected from the same locality 

 and bed. 



The fossil fragments in the conglomerate of Comley Quarry 

 usually occur matted together in clots of calcareous material about 



x2 



