PJ.ATE L. 



Genus Monograptus (Rastrites). 

 Figs. 



a—e. — Monofjraptus (Easlrifes) peregrimis (Barrande). (Page 488.) 



1 a. Characteristic specimen. Dobb's Linn. Birkhill Shales (zone of Monog. gregarius). 



EUes' Collection. 

 1 I. Small fragment. Dobb's Linn. Birkhill Shales (zone of Monog. convolutus). 



EUes' Collection, 

 1 c. Fairly complete specimen. Ibid. 

 1 d. Portion of slab, showing the method of occurrence. Coalpit Bay, Donaghadee. 



Llandovery Beds. Belfast Natural History Museum. 



1 e. Fragment with shorter thecae. Craigdarkes Hill, Dunscore. Birkhill Shales. Geo- 



logical Survey of Scotland. 



2 a — g. — Monograptus {Rastrites) longisinnus (Perner). (Page 489.) 



2 a. Large and typical specimen, showing sicula. Grennan Point, Dumbreddan Bay, 



S. of Portpatrick. Birkhill Shales. Geological Survey of Scotland. 

 2 h. Large, but less nearly complete specimen, and with more open curvature. Coalpit 



Bay, Co. Down. 13irkhill Shales. Belfast Natural History Museum. 

 2 c. Smaller specimen, with shorter thecae. Dobb's Linn. Birkhill Shales. Lapworth's 



Collection. 

 2 d. Specimen with more open curvature at the proximal end. Garple Linu, near Moffat. 



Birkhill Shales. Geoloj^ical Survey of Scotland. 

 2 e. Smaller specimen. Dobb's Linn. Bii-khill Shales. Sedgwick Museum. 

 2/. Long distal fragment, somewhat distorted. Mealy Gill, Coniston (zone of Monog. 



fimbriatus). Skelgill Beds. Sedgwick Museum. 



2 g. Small specimen, preserved in relief, and showing the reflexed apertural terminations. 



430 yds. S.S.E. of Bryn-chwith Farmhouse, Pont Erwyd. Geological Survey of 

 England and Wales, Jermyn Street. 



3 a — d. — Monograptus (Rastrites) setlger, EUes and Wood, uov. (Page 490.) 



3 a. Proximal fragment, showing part of sicula. 430 yds. S.S.E. of Bryu-chwitli Farm- 



house, Pout Erwyd. Geological Survey of England and Wales. 

 3 b. Distal fragment. Skelgill Beck, Lake District. Skelgill Beds (zone of Monog. 



fimbriatus). Sedgwick Museum. 

 3 c. Distal fragment, showing the irregular curvature. Ibid. 



3 d. Distal fragment. Same locality, etc., as fig. 3 a. 



4rt — /. — Monograptus (Rastrites) hybridus (Lapworth). (Page 491.) 



4 a. Typical sj^ecimen. Dobb's Linn. Birkhill Shales. Lapworth's Collection. 



4 b. Specimen showing the typical declination of the thecae. Skelgill Beck. Skelgill Beds. 



Sedgwick Museum. 

 4 c. Fragment showing proximal end. E. side of quarry, N.E. of Fagwr Fawr Farmhouse, 



2 miles E.N.E. of Pont Erwyd. Geological Survey of England and Wales. 

 4 d. Two fragments in juxtaposition. Dobb's Linn. Birkhill Shales. Geological Survey 



of Scotland. 



4 e. Distal fragment. Belcraig Burn. Birkhill Shales. Sedgwick Museum. 



4/. Distal fragment with irregular curvature. Dobb's Linn. Birkhill Shales. Sedgwick 

 Museum. 

 5fl — d. — Monograptus (Rastrites) approximatus, var. Geinitzl (Tornquist). (Page 492.) 



5 a. Fragment with proximal end enrolled; thecae showing " phleoid " development. 



10 yds. up stream from crest of anticline, 30 yds. N. of Fuches-gau Farmhouse, 

 Pont Erwyd. Geological Survey of England and Wales. 



5 h. Enrolled proximal fragment. S. side of old quarry, 270 yds. N.E. of Gwen Ffrwd 



Uchaf Farm, Pont Erwyd. Geological Survey of England and Wales. 



6 c. Few thecae showing " phleoid " development. Same locality, etc., as fig. 5 a. 



5 d. Larger fragment. Dobb's Linn. Birkhill Shales. Sedgwick Museum. 

 Qa — e. — Monograptus (Rastrites) maximus (Carrutiiers) . (Page 494.) 



6 a. Typical specimens in association. Thirlstane Score, near Moffat. Upper Birkhill 



Shales. Lapworth's Collection. 

 6 b. Fragment near proximal end. Eiskinhope Burn, S. Scotland. Upper Birkhill 



Shales. Lapworth's Collection. 

 6 c. Typical fragment. Same locality, etc., as fig. 6 a. 

 6 d. Very large specimen, witii the thecae at rather irregular intervals. Kirkhope Linn, 



Ettrickbridge. Geological Survey of Scotland. 



6 e. Specimen with shorter thecae, possibly a proximal fragment. Belcraig Burn. Upper 



Birkhill Shales (band of Monog. (R.) maximus). Miss McPhee's Collection, Glasgow 

 University. 

 7rt — d. — Monograptus (Rastrites) fugax (Barrande). (Page 493.) 



7 a. Typical fragment. Duifkinnel, S. Scotland. Birkhill Shales. Lapworth's Collection. 

 7 h. Proximal fragment, showing sicula. Dobb's Linn. Birkhill Shales. Lapwoi'th's 



Collection. 

 7 c. Small fragment. Belcraig Burn. Birkhill Shales. Geological Survey of Scotland. 

 7 d. Specimens with irregular curvature. Duffkinnel. Birkhill Shales. Lapworth's 



Collection. 



