BY \V. X. BEXSOX^ W. 8. DUX, AXD \V. R. BROWXE. 351 



Mi-s. Seott from the Shelly Ridge iu the S.E. of Babbiiiboon. The type-speei- 

 men is No. F 12461 in the Museum of the Geological Survey. 



Spiriperina insculpta (Phillips). 



J. Phillips, Geol. Yorkshire, ii., 1836, p. 216, t. 9, f. 2-3; Davidson, Brit. Carb. 



Brach, p. 42, t. 7, f. 48-55; De Koninck, Foss. Pal. N. Galles Sud, 1877, 



English Translation, p. 197. 

 A portion of the pedicle valve of a specimen of this form, corresponding, as 

 far as could be seen, to the diagnoses of Davidson and De Koninck, was found by 

 Benson four miles east of Currabubula. It is a pedicle valve, moderately convex, 

 ornamented by five large bold angular ribs, separated by deep narrow gi-ooves. 

 Length of valve, 8 mm.; breadth, 11 mm.; thickness, 25 mm. De Koninck states 

 that this form belongs principally to the upper beds of the Carboniferous lime- 

 stone (30). It is recorded from the Upper Limestone Series only in Scotland 

 (31). In England it ranges from the zone of Ci to D2. 



SYRixciOTHYRis EXSUPERANS (De Koninck). 



Spirifera exsuperam, L. G. De Koninck, Foss. Pal. N. Galles Sud, 1877, English 



Trans., 189S, p. 195, t. 15, f. 1; Syrlti^othyris exsuperans, A. H. Foord. 



Geol. Mag. 1890, p. 149, 153; R. Etheridge fil., Ree. GeoL Surv. N.S.W., 



vi., Pt. i 1897, pp. 43-49. 



An example of this form has been recorded from "a shelly ridge twenty miles 



west of Tamworth." possibly that we have examined in the south-east of Babbin- 



boon, where a distinctive fragment of this form was obtained by ilrs. Scott. 



Retzia cf. ULSTRix (De Koninck) . 



Terehratula (Crispata) iilstrix, De Koninck, Anim. Foss. Belg., p. 292, t. 19. f. 



5; Retzia ulstrix, Davidson, Brit. Carb. Brach., 1858, p. 88, 218, t. 18. f. 



14, 15; t. 54, f. 45. 

 A specimen referred provisionally to this form has been recorded from the 

 parish of Bective at a spot to the south-east of Mt. Uriari. It has not been ex- 

 amined by us. This specimen is in the collection of the Geological Survey. 



AcTixocoxcHUS PLANOSULCATCs (Phillips). (Plate xxi.. figs. 3, 6.) 



Spirifera planosulcata, Phillips, Geol. Yorkshire, ii., 1836, p. 220, t. 10, f. 12; 

 Athyris planosulcatus , Davidson, Brit. Carb. Brach., 1859, p. 80, t. 10, f. 

 2-13, 15; De Koninck, Foss. Pal. N. Galles Sud., 1877, English Trans- 

 lation, 1898, p. 172, t. 9, f. 6; Actinoconchus planosulcatus, R. Etheridge, 

 fil., Ree. Geol. Sur. N.S.TY., v., Pt. 4, 1898, p. 177, t. 19, f. 18; Dun, Rec. 

 Geol. Sur. N.S.W., vii., 1902, p. 87, t. 21, f. 17; t. 22, f. 12-14. 

 Of the forms figured here, the larger has a length of 24 mm. and breadth of 

 36 mm., the size of the single valve being thus nearly three times as great as the 

 Australian form described by De Koninck. The other is somewhat smaller and 

 less oblong-ovate. Length, 23mm.; breadth, 27 mm. This shows numerous traces 

 of the ornamental fringes extending from the lamella, but the shell is smoothly 

 convex, whereas the other form shows the characteristic broad shallow sinus. 

 Collected by Mrs. Seott from Shelly Eidge, S.E. of Babbinboon, and by Cullen 

 from Parish of Moorowarra. 



De Koninck points out that this form occurs mostly in the Upper portion of 

 the Carboniferous (Limestone?) especially at Vise. It occurs in the Upper and 



