Victorian Graptolitc^. ) 1 1 



type averages 6 uii each side of tin' t'dur see()ii<l:ii-v Iji'aiuhes. or 

 about 48 in all. Width of branch to tip (jf denticle •> nun. Thecae 

 8 or 9 in 10 nun., inclined at 40° to 50o. Apertural margin at 

 130O. Thecae slightly cnrved, and expanded with a somewhat 

 mucronate dt'nticle, and overlapping about one-half their length. 

 The inner end of the outer wall reaches as far Ijack as the denticle 

 ■of the next theca but one. The type specimen is in the National 

 Museum. Melbourne, and is perhaps the most beautiful graptolite 

 known, though in point of size it is sui-passed by a few other 

 species, especially of ('lonor/rapf us. 



Locdlitj/. — Slate-quarry about <S miles S.W. of Woodend. I 

 have a less perfect specimen from the same locality. A fragment 

 of the same species was collected at an unknown locality at Bendigo. 



Horizon. — Castlemainian, but exact position uncertain. On the 

 same slab as the type occur Goniograptus fhureaui, Bidyniorirapt kk 

 ■caduceus, D. caduceus var. manuhriatus, Phi/llograj}tns cf. fijpKS, 

 ■Oncograptus upsiloti, and apparently a Trignnograptus, etc. 



The type was found by Mr. Neil Johnson, and presented to the 

 National Museum in 1889. 



GoNiOfiRAPTOS CRiNiTUS n. sp. (Text Figs. 2 and 3). 



This species is doubtfully referred to Goniograpfus as a com- 

 plete hydrosome is unknown. The specimens found are usually 

 in the form of stout branches, which are bent in a zig-zag, the 

 angular bending being more pronounced towards the proxinuil 

 •end. At times two or three branches are associated, as in the 

 figured specimen. The angles of the zig-zag are from two to four 

 mm. apart, and from the salient angles are given off fine, theca- 

 bearing branches, which are unbranched, and fairly rigid. These 

 may be 100 mm. long or more. The main branches are about 0.75 

 mm. in diameter, and do not appear to be theca -bearing. The 

 finest branches are about 0.5 mm. in diameter, measured across 

 the aperture of the theca. The thecae are raiely preserved, and 

 when not visible the branch is about 0.25 mm. wide, and about 

 as rigid as a liorsehair. The thecae number 11 in 10 mm., and are 

 straight-sided, inclined at about 10°, aperture normal to their 

 length. At first sight this species might be mistaken for a T/iam- 

 nograptus, and I formerly recorded it as such. The ultimate 

 branches are. however, theca-bearing, and are much shorter than 

 those figured by James Hall. Thamnogropfus does not occur in 

 the Bendigonian or Castlemainian series. 



