Vlcturlan (JraptoUh's. 105 



.at 1150. Sicula narrow, curved, 2 111111. li)ii<j;-. The branches are 

 given off near its apex, so that its pointed base projects beyond the 

 line of the thecal denticles, jj^iving the hydrosome a very charac- 

 teristic appearance in this region. Tlie small number of thecae 

 .and the salient denticles are also peculiai-. 



Locality/. — Daphne Reef, Lost (iully. Chewton. 



Horizon. — Highest zone of Bendigonian. 



DiDYiMofJKAPTUs GRACILIS Tomquist. (Pi. XVIT., Fig. 3). 



Tornciui.st. Acta l^niv. Lund. vol. 26, 1890, pt. 2, No. 4, 



p. 17, pi. 1, figs. 9-12. 

 Hall. Geol. Mag. 1899, p. 448. 



Hydrosome slender, about 1.3 mm. long, and very narrow, with 

 ii very delicate virgula, which is traceable for about 0.7 mm. 

 Branches extending at I8OO, and apparently arising at very dif- 

 ferent levels from the sicula, the left side of which projects as an 

 acute tooth. The left brancli is given off from about its middle, 

 the right branch appears To arise at the level of the a})erture. 

 Dorsal edge of the branch covexly swollen opposite the middle of 

 .each theca. Thecae 7 in 1 cm. ; slender, outer edge .straight and 

 facing somewhat inwards, the two edges forming an acute denticle. 

 Breadth of branch about 0.3 mm. ; width of theca at aperture about 

 the same. The virgula, or nema, is visible in some specimens, but 

 not in the specimen figured. 



The figured specimen is from Bendigo. 



Horizon. — I'pper Bendigonian. 



DiDYMOfiRAPTUS AUREUS n. sp. (Pi. XVIL, Fig. 4). 



Hydrosome resembling D. eoctensu.^ in form. Branches given (jff 

 from the sicula at I8OO, straight, and scarcely increasing in width. 

 Width at first theca L2 mm., at 2 cm. it is 1.5. Tliecae 8 in 

 1 cm. almost straight-sided, inclined at 30°, apertural angle 12()0. 

 Sicula 2.2 mm. long, slender, the branches arising near its l)ase. 

 The species differs from J), crtensus in its more even with, and in 

 the number of thecae in a given length. 



Zocrt/^^y.— Bendigo (T.S.H.); Bald Hill, Dromana (D. J. 

 Mahony). 



Horizon. — Lower Bendigonian. 



