PLATE XLVIII. 



Monograptus — continual. 

 Figs. 

 1 a — d. ^Monograptus urceolus, Richter. (Page -470.) 



1 a. Group of proximal fragments, associated with a specimen of 

 Bastrites. Duffkinnel, Wamphray. Birkhill Shales. Geo- 

 logical Survey of Scotland, Edinburgh. 

 1 b. Two specimens showing change in character of thecse. Belcraig 

 Burn. Birkhill Shales. Dairon's Collection, Kelvingrove 

 Museum, Glasgow. 

 1 c. Specimen, showing character of distal thecse. On same slab as 

 fig. 1 b. 

 d. Group of specimens. Belcraig Burn. Birkhill Shales. Geo- 

 logical Survey of Scotland. 



a 



2 a — /. — Monograptus denticulatus, Tornquist. (Page 474.) 



2 a. Typical specimen, preserved in relief. Skelgill Beck, Ambleside. 



Skelgill Beds. Elles' Collection. 

 2 b. Similar specimen, preserved in partial relief. Skelgill Beck, 



Ambleside. Skelgill beds. British Museum (Natural History), 



S. Kensington. 

 2 c. Specimen with broader curve. Long Linn, Dobb's Linn. Birkhill 



Shales (band of Cephalog. cometa). Elles' Collection. 

 2 d. Long specimen. Ibid. 

 2 e. Small specimen with broad curve. Skelgill Beck, Ambleside. 



Skelgill Beds. British Museum (Natural History). 



2 /. Fragment closely resembling one of Tornquist's figured specimens 



(loc. cit. supra, fig. 21), but doubtfully referable to this species. 

 Elwand Bank, near Melrose. Lapworth's Collection. 



3 a — c. — Monograptus raitzhavniensis (Eisel). (Page 473.) 



3 a. Good specimen, preserved in partial relief. Rheidol Gorge, 



Pont Erwyd. Zone of Monog. communis (Jones) Jones' 

 Collection. 

 3 b. Smaller and less complete specimen. Skelgill Beck ? Sedgwick 

 Museum. 



3 c. Distal fragment, less certainly referable to this species. 430 yds. 



S.S.E. of Bryn-chwith Farmhouse. Band of Mesog. magnus. 

 Geological Survey of England and Wales. 



-I <{ — d. — Monograptus fimbriatus (Nicholson). (Page 482.) 



4 a. Typical specimen, preserved in partial relief. Skelgill Beck. 



Skelgill Beds. Sedgwick Museum. 

 4 b. Small specimen, showing proximal thecas. Dobb's Linn. Lower 



Birkhill Shales. Geological Survey of Scotland. 

 4 c. Large specimen with characteristic proximal thecse. Garple Linn, 



near Moffat. Lower Birkhill Shales. Geological Survey of 



Scotland. 

 4 d. Very long specimen, incomplete proximally, somewhat distorted. 



On same slab as fig. 4 b. 



