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XI.—MuUusca from the Bokkeveld Beds. — By P. R. C. Eeed, 

 M.A., F.G.S. 



CEPHALOPODA. 



The representatives of this class are all in a poor and imperfect state 

 of preservation. None seem to have been previously recorded 

 from the Bokkeveld Beds. 



ORTHOCERAS GAMKAENSIS sp. nov. 

 (PI. XXX., figs. 1, la.) 



Shell slightly elliptical or subcircular in section, very slowly 

 tapering (1 in 13-14) ; siphuncle central ; septa horizontal, deeply 

 concave, about five in a distance equal to the diameter of the shell. 

 Surface of shell not preserved. 



One fragment measures 65 mm. in length, and at the upper end 

 is 28 mm. in diameter, and at the lower 23 mm. 



This species is perhaps comparable to Ulrich's Orthoceras sp. a * 

 from the Devonian of Bolivia. 



LocaIiti/.—(Nos. 177, 178) Gamka Poort. 



ORTHOCERAS BOKKEVELDENSIS sp. nov. 

 (PL XXX., fig. 2.) 



There is another and smaller species of Orthoceras represented in 



the collection with the following characters : Shell circular in 



section ; siphuncle small, slightly excentric ; septa simple, horizontal, 



iibout 2^ in a space equal to the diameter. Rate of tapering 1 in 



* Ulrich, Neues .Fahrl). f. Miner., Beil. Bd. viii., 1893, p. 39, t. ii., fig. 1. 



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