﻿Vol. 64.] m THE CARBONIFEEOUS ROCKS AT LOTJGHSHINNT. 451 



(j) ' Calopkyllum^ sp. (old-j(ge characters). 



Compare Thorns. & Nich., Ann. & Mag, Nat. Hist. 

 ser. 4, vol. xvii (1876) pi. vi, figs. 6 & 6 a. 



an"d7iDP L6 c) ( (^yc^i^^ophyllum Murchisoni, Ed. & H. 



y) Kouinckophyllum sp. (old-age variant). 



Compare K. intemiptum, Thoms. & Nich. 

 (x) Clisiophyllum cf. oblongum, Thoms. 



(ii) Brachiopods : 



(x, y) Froductus aniiquatus, Sow., Pr. concinmis, Sow., Pr. longi- 



spinus. Sow., and a transverse, sulcate variant of 

 Pr. semireticulatus (Mart.) (common in L 10 h). 



(x, y) Latissimoid Product i, including typical Pr. latissimiis, 



and (li4, L6) J. Sow. (common in L \2g). 



(x) Aculeate Producti, including Pr. spimilosus, Bow., Pr. 



and(L5 m, L7) Youngianus, Dav., and ProducUia, sp. no v. 



(x, y) Producius elegans, M'Coy, and a strongly spinous variety 



of Pr. ptmctatus (Mart.). 



(y) Producttis scahriculus (Mart.), Dav. 



(x) Chonetes Btichiana, de Kon. (typical form). 



(x) Orthotetid (exaggerated ribbing). 



(y) Spirifer aff . bisulcatus, Sow. 



(x) Spirifer cf . planicosta, M' Coy. 



(y) and (L 6 c) Spirifer convolutus, Phill. 



(x, y) Martinia glabra (Mart.), Dav. and M. near ovalis (Phill.). 



(x) Reticularia lineata (Dav.). 



^L bk L .5 7)i) I ^^^y'"^* cf. planosulcata (Phill.), Dav. 

 (y) and 1 Camarophoria crumena (Mart,), Dav. (equivalent to Dav., 



(L 8 i^, L 9 (?) ... J pi. XXV, fig. 4«). 



(iii) Lamellibranchs: 



(L10 6, 13«) and 1 75 • 7 • 77 7 • /t> \ 

 (L 5 A onwards)... | Posidomella Uvis (Brown). 



<'T 5 / to T 8 /") I ^osidono7nya Becheri (Sow.) (abundant). 



^^/-J^o^i ^"^ , , I Posidonomya membranacea (M'Coy). 

 (LB A onwaras)... j -^ . 



(iv) Cephalopods: 



(L 13 a) and (L 9e)... Glyphioceras spircde (Phill.). 



The position of these beds is definitely fixed by stratigraphy and 

 with equal precision by palaeontology, as shown in the above list 

 by the indices of the levels in the main sequence at which the 

 same fossils occur. 



(6) The Association of an Avonian Fauna with 

 Posidonomya Becheii. 



From the foregoing lists of fossils from the PosuZowom ?/a-Beds 

 (namely, the main sequence L 5 to L 9, and the repetitions L 16 to 

 L 20 and L 10 to L 13), it is clear that, at Loughshinny, charac- 

 teristic Avonian fossils (as, for example, Cyatliophijllum MurcJiisoni, 



