PLATE XXXII. 



Sub-genera Petalograptus and Cephalograptus ; genus Cryptograptus. 

 Figs. 



1 a — d. — Petalograptus pahneus (Barrande). (Page 274.) 



1 a. Typical specimen, with long virgular tube. Dobb's Linn, S. Scotland. Birkhill 



Shales. Lapworth's Collection. 

 1 b. Typical specimen, showing sicula. Dobb's Linn. Birkhill Shales (band with Monog. 



Clingani). Lapworth's Collection. 

 1 c. Wider specimen, obverse aspect. Ibid. 



1 d. Wide specimen, doubtfully referable to this species. Dobb's Linn. Birkhill Shales 



(zone of Manor/, gregarius). Geological Survey of Scotland, Edinburgh. 



2 a — -/. — Petalograptus palmeus, var. latus (Barrande). (Page 275.) 



2 a. Typical specimen, obverse aspect. Dobb's Linn. Birkhill Shales. Lapworth's 



Collection. 

 2 b. Typical specimen, reverse aspect. Ibid. 

 2 c. Shorter specimen, somewhat compressed. Dobb's Linn. Birkhill Shales. Sedgwick 



Museum. 

 2 d. Small specimen, figured Elles, ' Quart. Journ. Geol. Soc.,' 1897, vol. liii, pi. xiv, fig. 3. 



Garple Linn, near Beattock. Birkhill Shales (zone of Monog. gregarius) . Sedgwick 



Museum. 

 2 e. Characteristic small specimen, showing virgella, reverse aspect. Long Linn, Dobb's 



Linn. Birkhill Shales (zone of Monog. gregarius). Elles' Collection. 



2 /. Small specimen, obverse aspect. Ibid. 



3 a — d. — Petalograptus palmeus, var. tenuis (Barrande). (Page 276.) 



3 a. Typical specimen, cast, showing fine growth-lines. Dobb's Linn?, Birkhill Shales. 



Lapworth's Collection. 

 3 b. Typical specimen, showing sicula, figured Elles, ' Quart. Journ. Geol. Soc.,' 1897, 



vol. liii, pi. xiv, fig. 9. Pull Beck, Lake District. Browgill Beds (zone of Monog. 



crispus). Sedgwick Museum. 

 3 c. Small specimen in full relief, showing sicula, ? figured Elles, Ibid., fig. 10. Dobb's 



Linn. Birkhill Shales. Lapworth's Collection. 



3 d. Specimen in relief, showing no septum, reverse aspect. Morben Quarry, Derwentas, 



Machynlleth. Llandovery. G. J. Williams' Collection. 



4 a — d. — Petalograptus pahneus, var. ovato-elougatus (Kurck). (Page 277.) 



4 a. Typical specimen, showing virgula. Long Linn, Dobb's Linn. Birkhill Shales (zone 



of Monog. gregarius). Elles' Collection. 

 4 b. Specimen somewhat compressed. Branch Linn, Dobb's Linn. Birkhill Shales (zone 



of Cephalog. cometa). Elles' Collection. 

 4 c. Longer specimen, in partial relief. Dobb's Linn. Birkhill Shales. Geological 



Survey of Scotland, Edinburgh. 



4 d. Incomplete specimen. Ibid. 



5 a — e. — Petalograptus minor, Elles. (Page 279.) 



5 a. Typical specimen, in full relief, showing no septum, reverse aspect, figured, Elles, 



' Quart. Journ. Geol. Soc.,' 1897, vol. liii, pi. xiv, fig. 19. Skelgill, Skelgill Beds. 



Sedgwick Museum. 

 5 b. Similar specimen from same locality as fig. 5 a. 

 5 c. Typical specimen, obverse aspect. Long Linn, Dobb's Linn. Birkhill Shales (zone of 



Monog. gregarius). Elles' Collection. 

 5 d. Larger specimen on same slab as fig. 5 c. 

 5 e. Characteristic small specimen, showing growth-lines. Dobb's Linn. Birkhill Shales 



(zone of Monog. gregarius). Sedgwick Museum. 

 6. — Petalograptus efr. ovatus (Barrande). (Page 278.) 



Compressed specimen. Skelgill. Browgill Beds. Sedgwick Museum. 



7 a — e. — Petalograptus altissimus, Elles and Wood, nov. (Page 281.) 



7 a. Typical specimen, in relief. Ettrick Bridge End, Selkirk. Upper Birkhill Shales. 



Geological Survey of Scotland, Edinburgh. 

 7 b. Less complete specimen. Dobb's Linn. Upper Birkhill Shales (zone of Baslrites 



maximus). Lapworth's Collection. 

 7 c. Narrow specimen, in high relief, 200 yards S. of Parbryn Sands, Cardiganshire. 



Llandovery-Tarannon. 0. T. Jones' Collection. 

 7 d. Distal fragment in relief. Llanystwmdwy near Criccieth. Llandovery-Tarannon 



(zone of Monog. turriculatus) . Fearnsides' Collection. 



7 e. Flattened specimen. Woopland. Gala Beds. Lapworth's Collection. 



8 a — e. — Petalograptus folium (Hisinger). (Page 282.) 



8 a. Typical specimen (faulted), reverse aspect, figured, Elles, ' Quart. Journ. Geol. Soc.,' 



1897, vol. liii, pi. xiii, fig. 1. Belcraig, near Moffat. Birkhill Shales (zone of 

 Monog. gregarius). Elles' Collection. 

 8 b. Fragment of proximal end. Main Cliff, Dobb's Linn. Birkhill Shales (band with 

 P. folium). Elles' Collection. 



