184 Frederick Cluipntan : 



concentric striae, resembles very closely the above species. 

 L. striata is a Lower Ludlow and Wenlock species in Great 

 Britain. The present specimen is only one-third the length of 

 the measurements of the described example of Davidson's, but 

 the original of Sowerby's xA.ymestry specimens comes nearer, 

 with a length of 11 mm. The South Yarra specimen has a 

 black, carbonised appearance. 



Occurrence. — Silurian (mell>ournian). South Yarra (Yarra 

 Lnprovement Works). Collected by Mr. F, P. Spry. 



Lingula ati". symondsi, Davidson. (PI. XLV., Figs, s, 9). 



L'mgiihi si/tuondsl, Davidson (Salter Ms.), 1866, Mon, Brit. 

 Sil. Brach. (Pal. Soc), p. 45, pi. IIL, figs 7-17. 



Tiie description of this species, given by Davidson, is as 

 follows: — "Longitudinally oval or ovate, broadest about the 

 middle, slightly tapering at the beaks, rounded in front ; valves 

 moderately and evenly convex, one valve a little more so than 

 the other ; surface smooth, marked only with fine concentric 

 lines of growth. A large example measured — length 12, width 

 7 lines ; but the shell is more often smaller.'" 



The range of this species in Great Britain is from the Upper 

 Llandovery to the Lower Ludlow. The specimen before us is a 

 pedicle valve. It is roundly tapering tow^ards the beak, rounded 

 in front, moderately convex, and bears fine concentric lines of 

 growth. Very faint radial striae can be observed under a lens 

 in this Australian form, but since no other specimens are avail- 

 able it cannot be said whether the featuie is distinctive. 

 The fimbriate edges of the growth lines are probably due to 

 weathering. Li all other respects the shell is in close agreement 

 with the British specimens. One British example of L. symondsi 

 in the National Museum collection shows indications of i-adial 

 striae on the worn surface of the valve. 



Occurrence. — Silurian (probably passage beds between mel- 

 bournian and yeringian). N.E. of Kilmore. Geol, Surv, of Vic- 

 toria coll., locality Bb 24. The precise position is S.W. of Bald 

 Hills, E. of Dry Creek and Kilmore. Collected by Norman 

 Taylor, 10/1 l/oT. 



