PLATE XL. 



Monograptus — rontinued. 

 Figs. 



1 a — e. — Monograptus ivcornvKxhis, Tornqiiist. (Page 406.) 



1 a. Long distal fragment. Skelgill. Skelgill Beds (zone of Bimor- 



pliog. conferfiis). Sedgwick Museum. 

 1 b. Proximal fragment, slioAving characteristic double curvature. 



Dohb's Linn. Birkhill Shales. Lapworth's Collection. 

 1 6*. Distal fragment. Dobb's Linn. Birkhill Shales. Sedgwick 



Museum. 



1 d. Small distal fragment, partly in relief. Rheidol Gorge. Eheidol 



Group. Geological Survey of England and "Wales. 

 1^. Median fragment. Dobb's Linn. Birkhill Shales. Lapworth's 

 Collection. 



2 a — ('. — MoiiiKj-nipfiis fevnis (Portlock). (Page 407.) 



2 a. Specimen on Portlock's type slab, showing general form of poly- 



pary. Limehill, Co. Tyrone. Upper Llandovery Beds. Geo- 

 logical Survey of England and Wales. 



2 h. More distal fragment. On same slab as fig. 2 a. 



2 c. Small proximal fragment, cart track, 10 yards west of entrance 

 to lower quarry, 550 yards E.S.E. of Fuches-gau Farm-house, 

 Pont Erwyd. Castell Group. Geological Survey of England 

 and Wales. 



2 d. Distal fragment. On same slab as fig. 2 r. 



2 e. Proximal portion, labelled by Nicholson as Movogrnjjfus discvf'tus. 



Skelgill. Skelgill Beds. British Museum (Natural History), 

 S. Kensington. 



3 a — e. — Monograptus argutus, Lapworth. (Page 408.) 



3 a. Type specimen, showing general form, partly figured Lapworth, 



Geol. Mag., 1876, pi. x, fig. 13 h. Dobb's Linn. Birkhill 



Shales. Lapworth's Collection. 

 3 h. Proximal portion, showing curvature. S. side of old quarry, 270 



yards N.E. of Gwen-ffrwd-uchaf Farm, Pont Erwyd. Base of 



zone of M. convolutus. Geological Survey of England and 



Wales. 

 3 c. Proximal portion, (?) figured Lapworth, loc. cit., fig. 13 a. 



Dobb's Liim. Birkhill Shales. Lapworth's Collection. 

 3 d. Proximal fragment. Rheidol Gorge, 440 yards S.S.E. of Bryn- 



chwith Farm-house, Pont Erwyd. Base of zone of M. convolntus. 



Geological Survey of England and Wales. 

 3 e. Distal fragment, part in relief, part impression. On same slab as 



reverse side of fio-. 3 it. 



