the Lower Silurian Rocks of Victoria. 7 



small radicle, and diverging at an angle of about 170°. Stipes 

 narrower at the base, and gradually widening towards the 

 extremities. Radicle short, abruptly tapering to a point. 

 (Hall.) 



The specimen I have figured as this species appears to 

 correspond in form and number of cellules with Hall's species. 

 It likewise has some resemblance to Hall's D.{Grapt.)patulus ; 

 but the angle of divergence is less than in that species. It is 

 both a Quebec and Skiddaw form. 



Locality. Castlemaine, county of Talbot, in chocolate-co- 

 loured shale ; collected by Mr. G. H. F. Ulrich. 



Bidymograptus Pantoni?, M'Coy. PI. III. figs. 21 & 22. 



Graptolithus Pantoni (M'Coy), Salter, Quart. Journ. Geol. Soc. 1863, 

 xix. p. 138 (without description). 



To the specimens from which figs. 21 & 22 were drawn, I 

 have provisionally given the name of Didymograptus Pantoni) 

 M'Coy. I am not acquainted with any description or figure 

 of this Graptolite ; but, from a certain resemblance the spe- 

 cimens bear to Mr. Salter's D. v-fractus, which he considered 

 like Professor M'Coy's G. Pantoni, I have, as before stated, 

 provisionally given that name to them. Fig. 21 shows two 

 stipes placed in juxtaposition, with the union of the two with 

 the radicle wanting. Fig. 22 represents one stipe and a small 

 portion of the other, and enables us to judge of their angle of 

 divergence from the radicle, which appears to be much less 

 than that of Salter's figure of D. v-fractus, and still less than 

 Nicholson's representation of the same species*. That D. 

 v-fractus, Salter, and D. Pantoni, M'Coy, are identical, I am 

 not at all prepared to say ; the great difference in the angle of 

 divergence of the stipes would appear to separate them, of 

 course presuming the specimens here figured to be the latter 

 species. Should they be proved to be identical, Prof. M'Coy's 

 name would have priority. The number of cellules in a given 

 space in D. v-fractus and our present species does not corre- 

 spond, being greater in the former, so far as an opinion can be 

 formed from figures only. 



Locality. Mainroad Gully, Mia-Mia, Spring Plains, Redes- 

 dale, in red shale; collected by Mr. N. Taylor and the 

 writer. 



Genus Graptolithus, Linneeus. 



Graptolithus latus, M'Coy "j". PI. III. fig. 23. 



The fragmentary Graptolites referred to under this name 



* Mon. Brit. Grapt. 1872, pt. i. p. 104, fig. 48. 



t Quart. Journ. Geol. Soc. iv. p. 223 ; also Brit. Pal. Foss. p. 4, t. 1 B. 

 fig. 7 a, b, c. 



