PLATE XXV. 

 Dicranograptus-^-(co?i£mited). 



Figs. 



1 a — //. — Dicranograptus Nicholsoni, Hopkinson. (Page 171.) 



1 a. Very large typical specimen. Hartfell Spa. Hartfell Shales. 



Wood's Collection. 

 1 b. Ditto. Dobb's Linn. Hartfell Shales. Lap-worth's Collection. 

 1 c. Specimen in partial relief. Dobb's Linn. Hartfell Shales (zone 



of Climacug. Wilsoni). Wood's Collection. 

 1 d. Wide, flattened specimen. Hartfell Spa. Hartfell Shales 



(zone of I). Clingani). Lapworth's Collection. 

 1 e. Specimen with abnormally developed spines. Hartfell Spa. 



Hartfell Shales. Lapworth's Collection. 

 If. Type specimen. Figured, Hopkinson, ' Geol. Mag.,' 1870, vol. vii, 



pi. xvi, fig. 3 a. Dobb's Linn. Hartfell Shales. Sedgwick 



Museum. 

 1 </. Specimen with long biserial portion and curved stipes. Craig- 



michan Scaurs. Glenkiln Shales. Geological Survey of Scot- 

 land. Edinburgh Museum. 

 1 //. Specimen on same slab as, and lying in a direction at right angles 



to, Fier. 1 



&>• 



9- 



2 a—c.—Dlcranograptus cyathiformis, Ellcs and Wood, sp. nov. (Page 174.) 



2 n. Typical form. Dobb's Linn. Hartfell Shales. Sedgwick Museum. 



(Presented by Mr. William Swanston, Belfast.) 

 2 b. Counterpart of same specimen. 



2 c. Larger specimen doubtfully referable to this species. Hartfell 



Spa. Hartfell Shales. Wood's Collection. 



3 a — il. — Dicranograptus ziczac, Lapworth. (Page 177.) 



3 a. Type specimen. Figured, Lapworth, Cat. West Scott. Foss., 



pi. iii, fig. 77. Dobb's Liun. Grlenkiln Shales. Lapworth's 

 Collection. 



3 b. Large specimen. Craigmichan Scaurs. Grlenkiln Shales. Lap- 

 worth's Collection. 



3 c. Specimen with stipes crossing. Belcraig Burn. Glenkiln Shales. 

 Sedgwick Museum. (Presented by Mr. Swanston.) 



3 il. Specimen with stipes interlocking. Ibid. 



4 a — c. — Dicranograptus furcatus, var. minimus, Lapworth. (Page 179.) 



4 a. Specimen showing mesial spines. Glenkiln Burn. Glenkiln 



Shales. Lapworth's Collection. 

 41). Type specimen. Figured, Lapworth, Cat. West Scott. Foss., 1876, 



pi. iv, fig. 77 a. Cairn Hill. Glenkiln Shales. Lapworth's 



Collection. 

 4 c. Specimen with biserial portion incomplete, but showing mesial 



spines on the most distal theca? of the uniserial stipes. Glenkiln 



Burn. Glenkiln Shales. Lapworth's Collection. 



