Dr. T. J. Jehu — The Highland Border Series. 403 



Man)- years ago the remains of lladiolaria were detected by 

 Dr. Peach in the cherts near Guahian, east of Loch Lomond. Later 

 Dr. R. Campbell recorded the discovery of fossils in the black 

 shales, jaspers and cherts intercalated in a series of crushed green 

 igneous rocks north of Stonehaven (Geol. Mag., n.s., Dec. V, 

 Vol. YIII, 1911). 



The discovery of fossils in the Chert and Black Shale Series at 

 Aberfoyle was announced in Nature, June 6, 1912, and a further 

 communication was made at the meeting of the British Association, 

 Dundee. The fossils were found in pale-grey chert bands, 1 to 

 3 inches thick, in an exposure on the south-east side of the Bofrishlie 

 Burn, about 400 yards north-west of Arndrum. The remains occur 

 in muddy films in the chert. The great majority of the fossils are 

 hingeless Brachiopods. The collection was submitted for examination 

 to Dr. Peach, who determined the following forms : — 



Fig. 1. — The fossiliferous Chert beds, Aberfoyle. 



Brachiopods. 



1. Acrotreta. Specimens of this genus are by far the most common. 



There appear to be many examples of the species A. Nicholsoni, 

 Day. This is a form common in the Glenkiln (Upper Lhmdeilo) 

 Black Shales. It occurs in Arenig, Llandeilo, and Bala rocks in the 

 Southern Uplands. ^ 



2. Oholella. Species indeterminate ; several specimens found .pin one, 



the first fossil discovered in the region, both the external and' internal 

 casts are shown. 



3. Obolus. Species indeterminate ; a few specimens found. 



4. Lingulella. Species indeterminate ; several specimens found. One 



specimen shows the internal septum. 



Phyllocarid Crustaceans. 



Two specimens were obtained which appear to be allied to Lingulocaris. 



Annelids. 



The flattened chetse of Polychcete worms, longitudinally striated, like 

 some which have been described by Walcott. Annelid jaws. 



