PLATE LI. 



Grenus Monograptus (Rastrites) and Genus Cyrtograptus. 

 Figs. 



1 a — c. — Monograptus {liddrites) Linnsei, (Barrande). (Page 493.) 



1 a. Fragment near proximal end. Monnt Benger Burn, Yarrow. 

 Lower Gala Beds. Lap worth's Collection. 



1 h. Several fragments in association. Belcraig Burn. Lower Gala 

 Beds. Lapwortli's Collection. 



1 c. Specimen in relief, Pont-bi'en-dibyn, Llanbrynmair. Brynmair 



Beds (zone of Monog. tifn-ifidatun). Wood's Collection. 



2 a — e. — Monograptus {Rastrites) equidistans (Lap worth). (Page 500.) 



2 a. Type specimen. Figured Lap worth, Geol. Mag., 1876, pi. x, 



figs. 2 a, b. Elwand Water, Melrose. Lower Gala Beds. 

 Lapwortli's Collection. 



2 b. Similar specimen. Ibid. 



2 c. Proximal fragment, showing the shorter and more closely set 

 thecsB. Clanyard Bay, Drummore, Mull of Galloway. Lower 

 Gala Beds. Geological Survey of Scotland. 



2 d. Similar proximal fragment. Meigle Quarry. Lower Gala Beds. 

 Lapwortli's Collection. 



2 e. Irregular fragment with longer thec?e. Waterfall, Dobb's Linn. 



Lower Gala Beds. Lapwortli's Collection. 



3 a — c. — Cyrtogr<ip)tiis Miirclnsoni, Carruthers. (Page 505.) 



3 ft. Small, but well preserved specimen. Figured Elles, Quart. 



Journ. Geol. Soc, 1900, pi. xxiv, fig. G. Pencerrig, near 

 Builth. Wenlock Shales (zone of Ci/rtog. Murchisoni). Elles' 

 Collection. 



3 b. Similar specimen. Ibid. 



3 c. Large, but fragmentary specimen. Tarannon River. Nant- 

 ysgollen Shales (zone of Gurtog. Maycliisoiii). Wood's Collection. 



4. — Cyrtograptus Linnarssoni, Lapworth. (Page 511.) 



Type specimen. Figured Lapworth, Ann. Mag. Nat. Hist. [5], vol. v, 

 pi. iv, figs. 12 a, b; and Elles, Quart. Journ. Geol. Soc, 1900, 

 pi. xxiv, fig. 3 A. Builth Road. Wenlock Shales (zone of Ci/rtog. 

 Linnarssoni). Lapwortli's Collection. 



5 a — c. — Cyrtograptus synimetricus, Elles. (Page 509.) 



5 ft. Type specimen. Figured Elles, Quart. Journ. Geol. Soc, 1900, 



pi. xxiv, fig. 4 a. Coed Mawr, Builth. Wenlock Shales (zone 



of Cyrtog. synimetricus). Elles' Collection. 



5 b. Co-type specimen. Ibid., fig. 4 b. Quarry, S.E. of Castle Crab, 

 near Builth. Wenlock Shales (zone of Cyrtog. symmetricus). 

 Elles' Collection. 



5 c. Well-preserved specimen, showing sicula. Cautley, Westmoreland. 

 Wenlock Shales. Miss Welch's Collection. 



