Lower Silurian.-^ PALAEONTOLOGY OF VICTORIA. [GraploUtes. 



The specimen figured seems j)erfectly identical in all respects 

 witli the Canadian ones determined by Professor Hall. 



I have not seen any trace of the central disc in the Victorian 



specimens. 



Finely developed in the greenish soft slates of Bird Reef, 

 Bendigo ; well developed and very distinctly defined in the black 

 flags of section 20, Newham (B" 29) ; in Llandeilo flags of B" 39; 

 black flags N. of Lancefield (B" 27) ; and shales of section 20, 

 Spring Plains (B" 46). 



Explanation of Figokkb. 



Plate II. — Fig. 1, specimen, natural size, from Llandeilo flags. Bird Reef, Bendigo. Fig. la, 

 portion magnified, showing form of cells. 



Plate II., Fios. 2, 3, and .0. 



GRAPTOLITES (DIDYMOGRAPSUS) BRY0N0IDE8 



(Hall sp.). 



Description. — Polypidom of four equal simple steins arising from a very 

 slender cylindrical transverse funicle with a short conical radicle in its middle; each 

 stem is slightly curved at hasc, and rapidly enlarges in the space of 3 or 4 cells to a 

 broad, flat, parallel-sided, nearly straight stem, upvsrards of 3 inches long and varying 

 fi'om 1^ to 2 lines wide from back to tip of denticles. Cells extending from a 

 narrow common canal upwards and outwards at an angle of about 4.5° with a slight 

 curve, about 4 to 5 times longer than wide; 10 to 12 in a space of 6 lines; about I 

 of the lower edge free, leaving the denticles nearly equilateral and acutely pointed 

 usually without conspicuous mucronation or extension; the end concave. 



References. — G. bryonoides (Hall), Can. Org. Rem., dec. 2, t. 4, figs. 1 to 11 ; 

 ? G. latus (McCoy), Brit. Pal. Fos., p. 4, 1 B., fig.' 7. 



Although it is quite possible Brongniart may have had this 

 Graptolite before him when figuring and describing his Fncoides 

 serra, still no good could follow from adopting his name, as the 

 figure and description are not sufficiently accurate to give any 

 certainty to the reference, which is chiefly sujjported by the fact 

 that the rock and locality he cites arc not known to contain Fuci, 

 liut abound in Graptolites, with several spec'es of which his 



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