450 BRITISH GKAPTOLITES. 



nearly straight and therefore differed conspicuously from those previously figured 

 as belonging to M. lobiferus, though he frankly admitted that the distal fragments 

 of his new species and those of the accepted M. lobiferus were practically the same. 

 In our opinion there are but two forms in all, namely M. lobiferus, with, its 

 conspicuous lobes and slightly recurved proximal end, and M. millepeda, with 

 strongly recurved proximal end and with less conspicuous lobes in which a smaller 

 fraction of the theca is involved. 



Horizon and Localities. — Llandovery (zone of M. convoluttis). 



S.Scotland: Lockerbie; Dobb's Linn; Belcraig Burn; Garple Linn ; Duff- 

 kinnel. Lake District : Skelgill, Wales : Llanyst wmdwy ; W. side of old quarry 

 800 yds. X.E. Fagwr-fawr, 2 miles E.N.E. of Pont Brwyd; River Twymyn, 

 near Llanbrynmair. Ireland: Donaghadee. 



Associate.", etc. — Mo-nog. lobiferus is a very abundant fossil in the Graptolite 

 Shales of Middle Llandovery age in the zone of .If. convolutus, where it occurs with 

 M. convolutus, M. limatuliis, M, incolutus, M. communis, M. regularis, Orthog. bellulus, 

 Glimacog. scalaris, Petalog. folium, etc. 



Collections. — Geological Survey of England and Wales, Geological Survey of 

 Scotland, Sedgwick Museum, Fearnsides, Lap worth, and the Authors. 



Monograptus runcinatus, Lapworth. Plate XLV, figs. 2 a — g. 



1876. Monograptus runcinatus, Lapworth, Scott. Monograptidae, Geol. Mag. [2], vol. iii, p. 28, 

 pi. xx fig. 4. 



1876. Monograptus runcinatus, Lapwortb, Cat. West Scott. 

 Figs. 309 a — c. — Monograptus runci- Foss., pi. i, fig. 26. 



1877. Monograptus runcinatus, Lapworth, Grapt. Co. Down, 

 l'roc Belfast Nat, Field Club, p. 128, pi. v, fig. 7. 



1881. Monograptus runcinatus, Linnarsson, Graptolitskiffer 

 med M. turriculatus vid Klubbudden , Geol. Foren. i Stockh. 

 Forhandl , vol. v, p. 513, pi. xxiii, figs. 8—12. 



1892. Monograptus runcinatus, TOrnquist, Siljansomrad. 



natus, Lapworth. 



j c- \ Grapt., ii, p 27, pi ii, figs. 29, 30. 



Polypary slender, somewhat flexed, especially in 



a b c the proximal portion, several cm. in length, 



"■ Pr o« m ai end, showing sicuia hi widening gradually from "3 mm. to a maxi- 



relief, Enlargement of part ol PI. ° ° 



, „ XLV ' 7^. -"• , mum breadth of 1*5 mm. Thecaj eleven to 



''. Proximal 1 ragmen t preserved as a 



cast. Quarry, s. side main road eight in 10 mm. usually on concave margin, 



from Devil's Bridge to Rhayader, 



L'oo yards s. of Hodcoii Farm, those of the proximal portion with fully one- 



Cardigan shire. Geol. Survey of . 



England and Wales. half of the thecse isolated and retroverted to 



c. Proximal part of somewhat more . . , i • i 



rigid specimen, probably referable form a free lobe occupying about oilO-tlliru 



to this species. W. side of CTpper , , , ,,, ,. , n i i-j.ii ±i • 



Quarry, 550 yards E. of Faches gau the breadth ot the polypary ; distally this 



Farm. Cardiganshire Geol. Surrey t i i i i , , . .•,-*. ±i . ].,„<.., 



of England and Wales. lobe becomes pressed close against the adnate 



