114 T. S. HiOJ: 



Lorr///7//.— Beudigo (M. Dep. 79 Bo.. No. 9750, Type); Davles- 

 ford, Junction of Jim Crow and Spring Ci-eeks, T. S. Hart ; Dayles- 

 ford. Min. Dep., No. 12.820. 



lIor/:o/t. — Hiijrhest Bendig^onian. 



TKTIlAaHAPTllS VVrnTKLAWl H. .sp. (PI. XVII., Fig. ]G). 



Hydrosome slender. Primary branches at 180°, dividing at the 

 fifth theca. Length of branch, about 4.5 mm. Secondaries diverg- 

 ing at 90°, faii-ly rigid. Width of Itranclies nearly 0.5 mm. Sicula 

 long and narrow, length 1 mm., ])readth 0.2 mm. Thecae 10 in 

 1 cm., indenting the branch about half its width, inclined at 15^, 

 very slightly expanding. Apertui'e normal to the axis of the theca. 



The great length of the " funicle,'' slightly over 1 cm., and the 

 slender nature of the branches are well marked cliaracters. 



Locality. — Bendigo, Sheepshea*! Line (7!) lio. ), Mining De})art- 

 ment. No. 9756 Type. Counterpart, No. 9701. Associated with 

 T. serra, ( = T. amii), Go?)i(/rapf'i/s laxux, Didf/ntof/rapfns cac/vceus. 



Horizon . — Upper Bendigonian. 



MONOURAPTUS APLINI n. sp, (PI. XV II., Fig. 17). 



Very minute, curved towards the ventral side. The most com- 

 plete specimens from an open U-shaped figure. Thecae 18-20 in 

 10 mm. ; apparently coiled in a rounded mass and i^pening later- 

 ally. Sicula about 1 ram. long and narrow. 



This is tlie commonest graptolite in the beds just below the 

 Keilor bridge. The section was discovered by Aplin in 1854. and 

 was the first known graptolite locality in Australia. Unfortunately, 

 the fauna is in a very bad state of preservation, or sixty years 

 would not have elapsed before any species were described from the 

 locality. 



M. aplini is closely allied to M. exigaits, Nicholson, and .1/. 

 nodifer, Tornquist, but its minute size separates it from them. 



Locality. — Keilor, Aplin 's section. 



Horizon. — Silurian, Melbournian. 



MoNOGKAPTUs TUKRICULATUS Baiiande. (PI. XVII. , l^'igs. 18, 19). 



The conical spiral foi'm. and the produced aperturjvl angle of 

 this species are unmistakable. The only two specimens I liave seen 

 are on the same slab, and are those figured. The specimens are 



