Mr. C. Lapworth on new British Graptolites. 165 



described. His figure c may be intended for the same 

 species. It is less intelligible, however, and points rather in 

 the direction of Clonograptus. 



Horizon and Locality. Etage 2. Alum Slates of Vakkero, 

 near Christiania. Named after Professor Kjerulf, of the 

 University of Christiania, who was the first to figure this 

 form. 



20. Bryograptus Callavei, sp. nov. 

 (PI. V. figs. 21 a, 21 b.) 



Polypary consisting of two slender primary branches di- 

 verging from each other at a small angle, and originating 

 similar (compound?) secondary branches at irregular but short 

 distances upon the inner margin. Hydrothecae about twenty to 

 the inch, long and slender, with acuminate denticle, of the 

 general type of those of Dichograptus. 



I give this title to several fragments of a species of Bryo- 

 graptus placed in my hands for identification by Dr. C. Cal- 

 laway, with others collected by himself in the Shineton Shales 

 (Upper Cambrian) of Salop. Its close resemblance to the 

 species described from the corresponding Norwegian beds is 

 apparent at a glance ; and the small angle of divergence of 

 the branchlets in all the fragments known gives colour to the 

 view of the generic identity of these species and their common 

 distinctness from Clonograptus, Hall. 



I dedicate it to Dr. C. Callaway, whose numerous and 

 valuable contributions to Proterozoic and Archaean geology 

 are well known. 



Horizon and Locality. Shineton Shales of Cound Brook, 

 Shropshire (Upper Cambrian). 



Family Diplograptidse. 



21. Biplograptus physojjJwra, Nicholson. 

 (PI. V. figs. 26 a, 26 b.) 



Biplograptus physophora, Nicholson, Ann. & Mag. Nat. Hist. vol. i. ser. 4, 

 pi. iii. tig. 7. 



I give two figures illustrative of this very beautiful species, 

 the distinctness of which has been doubted by some palaeon- 

 tologists. It occurs in great numbers and in excellent pre- 

 servation in a single zone in the Birkhill Shales of South 

 Scotland, always with the same superficial characteristics ; so 

 that the validity of the species is now beyond question. As 

 it is mainly of interest from a zoological point of view, I shall 

 defer its description till a future occasion. 



Ann. & Mag. N. Hist. Ser. 5. Vol. v. 12 



