Distribution of the Rhabdophora. 



427 



Didymograptus extensus ?, Hall. 

 Dicranograptus ramosus, Hall. 

 f urcatus, Hall. 



Ccenograptus gracilis, Hall. 

 Goniograptus Tbueauri, M'Coy. 



Higher Bala or Caradoc Formation. 



Wales. — We now ascend into the rocks of which the Bala 

 or Caradoc age is unequivocal. The most prolific graptoliti- 

 ferous rocks of this date known to myself in Wales are ex- 

 posed in the railway-cutting a little west of the town of 

 Conway. Here the black shales of the district are crowded 

 with poorly preserved forms, principally* 



Dicranograptus Clingani, Carr. 

 Idiograptus margaritatus, Lapiv. 



Diplograptus foliaceus, Murch. 

 Climacograptus bicornis, Hall. 



In the railway-cutting near the tunnel above Cynghordy 

 station, South Wales, the black shales of Bala age have 

 afforded me 



Diplograptus foliaceus, March. 

 Climacograptus bicorni3, Hall. 



DieellograptusForchliammeri,(7em. 



and a few others. 



In the Harnage shales of the Caradoc area of Shropshire, 

 Diplograptus foliaceus is not uncommon. A species of 

 Climacograptus, allied to C. Wilsoni, Lapw., was met with 

 by myself at Soudley. An example of D. foliaceus, Murch., 

 from the Caradoc of Robeston Wathen, is preserved in the 

 Jermyn-Street Museum t- 



Scotland. — The higher Caradoc beds of Wales are repre- 

 sented in South Scotland by the Middle Moffat beds, or Hart- 

 fell Shales. Up to the present date I have collected from 

 these the following species : — 



Pleurograptus linearis, Carr. 



radiatus, Lapiv. 



Amphigraptus divergent, Hall. 

 Leptograptus fiaccidus, Hall. 



capillaris, Carr. 



Dicellograptus moffatensis, Car, 



anceps, Nich. 



Forclikarnmeri, Gem. 



Morrisi, Hopk. 



caduceus, Lapw. 



elegans, Carr. 



complanatus, Lapw. 



Dicranograptus ramosus, Hall. 



Nicholsoni, Hopk. 



Clingani, Carr. 



Glossograptus Hincksii, Hopk. 

 Lasiograptus Harknessi, Nick. 

 Idiograptus margaritatus, Lapw. 

 Retiolites fibratus, Lapw. 

 Climacograptus bicornis, Hall. 



caudatus, Lapw. 



tubuliferus, Lapiv. 



Wilsoni, Lapw. 



Scharenbergi, Lapw. 



Diplograptus foliaceus, Murch. 



tricornis, Carr. 



truncatus, Lapw. 



quadrimucronatus, Hall. 



socialis, Lapiv. 



euglyphus, Lapw. 



* Compart' also Salter, Memoirs Gcol. Surv. vol. iii. pi. xii. &c. 

 t Case lv. i y\. 



