342 GEOLOGY AXD PETROLOGY OF THE GREAT SERPENTIXE BELT OF X.S.W., 



CRINOIDEA. 

 Cactocrinus ? BROWXEI^ sp. nov. (Plate xix., fig. 1.) 



The specimen is an external cast, in a ferruginous mudstone or aririllaceous 

 limonite, of a part of a calyx showing the upper portion of the first columnal and 

 the right and left massed basal plates, the anterior not being visible. In the 

 radial cycle can be seen the hexagonal anal plate, broad and symmetrical in form, 

 with its superimposed inter-radial plates, of which three cycles are preserved . 

 The plates generallv are characterised by their regularity of form and hexaradiate 

 ornamentation, the point of radiation being marked by a tubercle. Xo definite 

 idea can be obtained as to the nature of the tegmen, nor as to the condition of 

 the anal opening, nor yet of the brachia. The general form of the calyx is glo- 

 bose and somewhat depressed. The form is not comparable directly with any 

 known form except perhaps Ca-ctocrinus ectypus (Meek and Worthen). though 

 differing widely from it in urnamentation. The classification of the Actinocrin-.- 

 (lae, so characteristic of the Lower Carboniferous formations, is based on the con- 

 dition of the anal tube, and the conformation of the brachials, information iis to 

 ■which cannot be obtained from our specimen. It appears, however, from the shape 

 of the radial and fused brachial plates to approach closely to Waclismuth and 

 Springer's Cattocrhius. 



Dimensions: Height of calyx. 18.5 mm.; breadth of calyx, 26.0 mm.; heiglit 

 of anal plate, 4.0 mm.; lireadth of anal plate, 4.0 mm.; height of right posterior 

 radial i^late, 4.5 mm.; breadth of right posterior radial plate, 3.7 mm. 



We name this in honour of our colleague, Mr. W. R. Browne, B.Sc. Our 

 specimen was collected by Mr. W. Donaldson, south of the railway line, four 

 miles east of Currabubula, and is now specimen No. F12,454 in the collection of 

 llie Geological Survey. 



A fragment of a calyx with an ornamentation very similar to that shown on 

 C. brownei which has been figured and described as Actinocrinus sp. indet. was 

 found in the Star Beds near Rockhampton, Queensland.* 



BRYOZOA. 



ThaJIXISCUS sp. INDET. 



King, Ann. Mag. Nat. Hist, (2). iii., 1849, p. 389. 



In manuscripts left by the late Mr. R. Etheridge. Junr., a form not deter- 

 minable specifically was described as belonging to this genus. It was collected 

 in the parish of Moorowarra, south of Somerton, by Cullen, and near Carroll by 

 Porter. 



Fenestella spp. ixdet. 



Indeterminate specimens belonging probably to this genus, occur four miles 

 east of Currabubula. Collected by Benson. 



BRACHIOPODA. 



Orthotetes (Schellwienella) crexistria (Phillips). 



Orthotetes crenistria. Dun, Rec. Geol. Sur. N.S.W., vii., 1002, p. 82, t. 23, f. 11. 

 and Bibliography. 



•K. Etheridge Junr., in Geol. Vn\. Qslfl., 1892, p.207. t.7. f.9. 



