30 Proceedings of the Royal Society of Victoria. 



branches, which are again several times bifurcated. Hydrothecse 

 commence above the third bifurcation, that is taking the division 

 of the sicula into two branches, which form the funicle, as the 

 first bifurcation. Stipes slender, flexuous, diverging at a smaller 

 angle at each successive bifurcation ; filiform at base, and, where 

 the hydrothecse are developed, measure from 1 mm. to 1'75 mm. 

 The non-hydrothecal-bearing stipes measure about "5 mm. in 

 width. In the entire stock there are six bifurcations, giving rise 

 to sixty-four branchlets in all. Breadth of the entire stock 

 about 9 cm. 



Hydi'othecfe, short and acute, indent the branches for one-half 

 the width, and are free for nearly one-half their length ; length 

 being about four times their diameter ; aperture or upper margin, 

 straight, making an angle of 9U° with the axis, lower margin 

 straight and inclined to the axis at about 30°. Hydrothecaj 

 number from ten to eleven to the centimetre. 



Obs. — In some of the Lancefield specimens the angle at 

 which the parts of the divided extremities of the funicle diverge 

 is a little greater than that mentioned above, beincr 112° in the 

 specimens under notice ; also the length of the four main stipes 

 is from "5 to 2-5 mm. longer in some examples. The hydrothecse 

 agree well with the oi'iginal description. On the whole, the 

 agreement of Lancefield specimens with the American is remark- 

 ably close and accurate. 



This is, I believe, the first record of the occurrence of this 

 species in Victoria, and is all the more interesting on that 

 account, as it is another example of the wide distribution of 

 Graptolite species. 



Tetragraptus quadribrachiatus, Hall. 



This species occurs leather commonly associated witli the 

 previously described forms from this locality. It is generally 

 somewhat small, and the hydrothecaj are often not preserved, but 

 occasionally a well-developed specimen has turned up with stipes 

 quite two and one-half inches in length. 



In addition to the above, I have a new species of Dictyonema, 

 Didymograptus represented by, at least, one species, Tetragraptus^ 

 probably two forms, Leptograptus, also two forms, and another 

 species of Clonograptus. Notes on these I hope to be able to add 

 on some future occasion. 



