PLATE XL IX. 



Monograptus — continued. 



Fifts. 



1 a — e. — Monograptus communis (Lap worth). (Page 480.) 



1 a. Type specimen, figured Lapworth, Geol. Mag., 1876, pi. xiii, 

 fig. 4 a. Dobb's Linn. Birkhill Shales. Lapworth's Collec- 

 tion. 



1 b. Well-preserved specimen, in partial relief. . Rheidol Gorge, Pont 

 Erwyd. Jones' Collection. 



1 c. Typical specimen. Dobb's Linn. Birkhill Shales. Sedgwick 

 Museum. 



1 d. Form with wide proximal curve, intermediate in character between 

 M. communis and M. millepede/.. Ibid. 



1 e. Curiously curved specimen, provisionally referred to this species, 



preserved in partial relief. Dobb's Linn (?) British Museum 

 (Natural History), South Kensington. 



2 a — c. — Monograptus communis, var. rostratus, Elles and Wood, var. now 



(Page 481.) 



2 a. Typical specimen, showing long proximal theca?. Dobb's Linn. 



Birkhill Shales. Lapworth's Collection. 

 2 h. Well preserved and typical specimen. Dobb's Linn. Birkhill 

 Shales. Geological Survey of Scotland. 



2 c. Specimen with more abrupt proximal curvature. On same slab 



as fig. 2 b. 



3 a — c. — Monograptus intermedins (Carruthers). (Page 485.) 



3 a. Portion of slab, showing mode of occurrence. Sundhope-on- 



Yarrow, S. Scotland. Birkhill Shales. Lapworth's Collec- 

 tion . 

 3 b. Single proximal fragment. Ibid. 



3 c. Distal fragment. Ibid. 



4 a — c. — Monograptus in ruin fas (Lapworth). (Page 478.) 



4 a. Portion of slab, showing mode of occurrence. Sundhope-on- 



Yarrow. Birkhill Shales. Lapworth's Collection. 

 4 b. Single specimen. Dobb's Linn (?). Birkhill Shales. Lap- 

 worth's Collection. 



4 c. Small fragment, showing form of polypary. W. side old quarry, 



N.E. of Fagwr-fawr, 2 miles E.N.E. of Pont Erwyd. Geolo- 

 gical Survey of England and Wales. 



5 a — c. — Monograptus cfr. elongatus, Tornquist. (Page 480). 



5 a. Fragment. Llanystwmdwy, near Criccieth. Llandovery Beds. 



Fearnsides' Collection. 

 5 b. Small fragment. Ten yds. up stream from crest of anticline, 



N. of Fuches-gau Farmhouse, Pont Erwyd. Geological 



Survey of England and Wales. 

 5 c. Small proximal fragment. Rheidol Gorge, 440 yds. S.S.E. of 



Bryn-chwith Farmhouse, Pont Erwyd. Geological Survey of 



England and Wales. 



