PLATE XXVI. 

 Genus Climacograptus. 



FIGS. 



1 a — c. — Climacograptus scalaris (Hisinger). (Page 184.) 



1 a. Specimen showing proximal end. Belcraig Burn, S. Scotland. Upper Birkhill Shales. 



Hopldnson Collection, Sedgwick Museum. 

 1 b. Incomplete specimen. Ibid. Elles' Collection. 



1 c. Larger specimen. Donaghadee, Ireland. Birkhill Shales. Elles' Collection. 



2 a — g. — Climacograptus scalaris, var. normalis, Lapworth. (Page 186.) 



2 a. Type specimen. Figured, Lapworth, Graptolites of Co. Down, 1877, pi. vi, fig. 31. 



Lower Birkhill Shales (zone of Cephalog. acuminatus). Dobb's Linn. Lapworth's 



Collection. 

 2 b. Narrow specimen showing sicula. Ibid. Elles' Collection. 

 2 c. Reverse view. Ibid. 



2 d. Long specimen. Ibid. H. Lapworth's Collection, 

 2 e. Specimen with long distal virgula. Ibid. 

 2/. Obverse view. Ibid. 



2 g. Specimen in low relief. North Cliff, Dobb's Linn. Lapworth's Collection. 



3 a — h. — Climacograptus scalaris, var. miserabilis, Elles and Wood, nov. (Page 186.) 



3 a. Complete specimen. Dobb's Linn. Upper Hartfell Shales (zone of Dicellog. com- 



planatus). Lapworth's Collection. 

 3 b. Incomplete specimen. Ibid. 

 3 c. Specimen showing proximal end. Ibid. 

 3 (I. Ditto. Ibid. 

 3 e. Ibid. 

 3/. Narrow form (?) Upper Hartfell Shales (zone of Dicellog. anceps). Dobb's Linn. 



Wood's Collection. 

 3 g. Slender parallel- sided form, doubtfully referable to this variety. Ibid. Elles' 



Collection. 



3 h. Ibid. 



4 a—f. — Climacograptus medius, Tornquist. (Page 189.) 



4> a. Complete and typical specimen. Lower Birkhill Shales (zone of Diplog. vesiculosus). 

 1'obb's Linn. Sedgwick Museum. 



4 b. Specimen which tapers more at the proximal end. Lower Birkhill Shales (zone of 



Diplog. vesiculosus). Main Cliff, Dobb's Linn. Elles' Collection. 

 4 c. Distal fragment. On same slab as fig. 4 a. 

 4 d. Young specimen preserved as a cast, showing incomplete septum. Fachdre Beds 



(zone of Dimorphograptus), Plas Pennant, Llanbryninair. Wood's Collection. 



4 e. Young specimen, showing long virgella. Same slab as figs. 4 a and 4 c. 

 4/. Ditto, showing two long proximal spines. Ibid. 



5 a — e. — Climacograptus rectangidaris (M'Coy). (Page 187.) 



5 a. Type specimen in relief. Figured, M'Coy, British Palaeozoic Fossils, pi. i b, fig. 8 a. 



Birkhill Shales. Moffat. Sedgwick Museum. 

 5 b. Cast of same. Fig. 8. 



5 c. Longer specimen, preserved in scalariform view. Ibid. Fig. 9. 

 5 d. Small incomplete specimen. Birkhill Shales. Moffat. Sedgwick Museum. 



5 e. Ibid. 



6 a—f. — Climacograptus Tornquisti, Elles and Wood, sp. nov. (Page 190.) 



6 a.? Specimen figured, Lapworth, as C. rectangular is, Graptolites of Co. Down, 1877, 



pi. vi, fig. 32. Dobb's Linn. Birkhill Shales. Lapworth's Collection. 



6 b. Smaller specimen, showing reverse view, on same slab as fig. 6 a. 



6 c. Larger specimen, showing tubular virgella. Dobb's Linn. Birkhill Shales. Lap- 

 worth's Collection. 



6 d. Ditto, preserved in scalariform view. Ibid. 



6 e. Specimen with very long tubular virgella. Obverse view. Ibid. 



6f. Small well-preserved specimen, reverse view. Waterfall, Long Cliff, Dobb's Linn. 

 Birkhill Shales. Lapworth's Collection. 



