PLATE XXXVI. 

 Genus Monograptus/Geinitz. 



Note. — The figures on Plates XXXVI — XLI {which should he studied with a hand lens) are 

 ai^jJTOximately natural size, hut there are slight variations. 



Figs. 



1 a — e. — Monocjraptus cijplms, Lapwortli. (Page 362.) 



1 a. Typical specimen, showing sicula. Dobb's Linn, S. Scotland. 



Lower Birkliill Shales. Lapworth's Collection. 

 1 h. Incomplete specimen, broadly recurved. Waterfall, Long Burn, 



Dobb's Linn. Lower Birkhill Shales. Lapworth's Collection. 

 1 c. Incomplete specimen, preserved in relief. Dobb's Linn. Birkhill 



Shales. Sedgwick Museum. 

 1 tl. Specimen, with abrupt curvature of the proximal portion. Dobb's 



Linn. Lower Birkhill Shales. Lapworth's Collection. 



1 e. Incomplete, but long specimen, (?) figured Lapworth, Geol. 



Mag., 187G, pi. xii, fig. 3 a. Ibid. 



2 a — e. — Monograptus acinaces, Tornquist. (Page 364.) 



2 a. Median fragment, in relief, figured Jones (as M. rheidolensis), 



Quart. Journ. Geol. Soc, vol. ixv, p. 534, fig. 19 a. Rheidol 

 Gorge, Pont Erwyd, Cardiganshire. Rheidol Group. Geological 

 Survey of England and Wales, Jermyn Street (23708). 



2 h. Reverse of above specimen, cast. 



2 c. Fragment of proximal end. Nant Fuches-wen, Pont Erwyd. 

 Rheidol Group. Jones' Collection. 



2 d. Distal fragment in relief, figured Jones (as M. rlieidolensis), Quart. 



Journ. Geol. Soc, vol. Ixv, p. 534, fig. 19 c. Rheidol Gorge. 

 Geological Survey of England and Wales (23709). 



3 a — d. — Monograftiis gregarius, Lapworth. (Page 365.) 



3 a. Part of the type slab, showing the gregarious habit of this 



species. Dobb's Linn. Birkhill Shales. Lapworth's Collec- 

 tion. 



3 h. Complete specimen on same slab as above. 



3 c. Ibid. 



3 (/. Small specimen, in relief. Penwhapple Glen, Girvan. Llan- 

 dovery Beds. Lapworth's Collection. 



