Br TV. X. BEXSOX, TV. S. DUX, AXD W. R. BROTVXE. 



359 



approximately quailraugular whorls, with rounded angles, the lower exterior 

 angle of each whorl bearing prominent tubercles. The shell is loosely coiled into a 

 low spiral with a very broad umbilicus, the conical angle of which is about 120°. 

 The base is 18 mm. in diameter and the body whorl at the aperture is 6 mm. 

 in diameter . 



This species was instituted by Etheridge to include forms obtained from the 

 Star, Gympie, and Middle Bowen Series of Queensland. 



Phaxerotrema .wstralis, sp. nov. (Plate xxiii., fig. 13; Text-fig. 16.) 



Phanerotrema, Fischer, Man. Conchyl., 1887, p. 851, 



The shell is depressed, sub-tui-binate, and umbilicate, consisting of four or 

 five rapidly enlarging whorls, coiled into a laterally compressed or oval spiral. 

 The superior whorls are rounded, but the greatly enlarged body whorl is flat- 

 tened on the upper portion with a distinct shoulder, at the angle of which is 



Te.xt-fis;.15.— v7/o«)-/o//;(r Te^t-^g-m.—Phatierolreiiia Text-R^-IT .—Bf/Zeivp/ioii 



sp. indet. Babbinboon. aus/ni/is, s^i. no\. to shov; of. /»'«/<-;« Martin, and 



/jj 4^ form of body whorl. Bab- Bellerophon sp. indet. 



^ ■'■^" hinboon. Babbinboon. 



situated the slit-band between two ridges. Thi rounded lower surface nf the 

 body whorl passes fonvard into a sharp lower peripheral angle making a sub- 

 quadrate aperture. A little of the original test preserved on the original of 

 Text-fig. 16 "is composed of three layers, and is marked with very fine gi-owth 

 lines descending obliquely forward .iust below the slit-band. 



Dimensions : Plate xxiii., fig. 13, Text-flg. 15. 



Height of spire 12 mm. . — 



Body whorl near aperture.. 29 mm. 34 mm. 



Height 15 mm. 16 mm. 



Breadth 15 nun. 16 mm. 



The fii-st of these has an angle of spire of 135°, but the tip of the spire has 

 been broken from the second shell. The first shell is Specimen 4659 in the col- 

 lection of the Geological Survey; the second was obtained by Mrs. Scott from 

 the south-east of Babbinboon, and is in the collection of the University of Sydney. 



Phaxebotrema australis var. alta, var. nov. (Plate xxiii., figs. 9, 10.) 



This form differs from the type of the species in tlie more elevated character 

 of the spire, the dimensions being: Height, 25 mm.; breadth, 30 mm.; aperture of 

 whorl, height and breadth, 20 mm. It consists of four whorls with a spiral 

 angle of 110°. In the form studied there was faint evidence of some concentric 

 spiral striae, crossed by gi-owth lines. The form is represented by Specimen 

 4642 in the collection of the Geological Surrey obtained by Cullen from ^looro- 

 warra. 



