BY \V. N. BEXSOX, W. S. DUN, AND W. R. BROWN K. 357 



umbilicus, the ridges or spiral striae are more than a score in number and extend 

 into the umbilicus itself. The faintly marked and delicate growth lines cross 

 these ridges, giving- the shell a slight sub-cancellate appearance. Two specimens 

 are available of this form, respectively 4684 and 4642 in the collection of tlie 

 Geological Survey. The dimensions of these are : Diameter of base, 29 mm., 

 or in the more complete shell 25 mm. In the latter also the height of the shell 

 is 17 mm. ; the heia-ht of the aperture is 12 mm., and the breadth 14 rmn. These 

 forms were collected by C'ullen from the Parish of i\Ioorowarra, south of 

 Somerton. 



MouRLO.viA ORXATA, sp. nov. (Plate xxii., fig. 1.) 



Mourlonia, De Koninck, Ann. Mus. Roy. Nat. Hist. Belg., viii., 1883, p. 75. 

 This beautiful fossil is represented by Speoimen No. 4382 in the collection 

 of the Geological Survey, obtained by Cullen from the Parish of Moorowarra, 

 south of Somerton. The shell is turbinate and elevated, only two wliorls are 

 present, the upper jiart having been broken away. The body whorl is highly 

 distended, oval in cross section, with two marked ridges limiting the narrow 

 slit-band on the periphery. Between these and the upper suture there are four 

 small spiral ridges alternating- with four others that are still smaller. On the 

 lower side of the slit-band there are several less distinct ridges. These are tra- 

 versed by delicate growth lines g-iving a sub-cancellate appearance. There is a 

 small umbilicus. The dimensions are : Probal)le height, 25 mm. ; diameter of 

 base, 21 mm.; height of body whorl, 12 mm.; l)readth, 13.5 mm.; angle of spire, 

 70°. 



MOURLOXIA SP. INDET. (Tcxt-tig. 15.) 



The forms are turreted, but depressed, the spiral angle being about 95°. 

 They consist of three or four pentagonal whorls with strongly impressed sutures. 

 The upper surfaces of the whorls are excavated and bordered by a strongly- 

 ridged shoulder, below which the flattened area of the broad slit-band slopes out- 

 wards and d<iwnwards to the lower angular ridge, where the whorl bends sharply 

 in t'owards the umbilicus. Below this, but lying nearer to the periphery than to ' 

 the centre of the liroad flat umbilicus, is a third but \ery subordinate angular 

 ridge . 



The specimens are internal casts only, and do not show the external orna- 

 mentation. The dimensions of two specimens are as follow: — Height, 8 mm., 8.5 

 mm.; diameter, 15 mm., 22 mm.; height of aperture, 6, 8; breadth, 9, 10 mm. 



These forms of this type were obtained bv Mrs. Scott in the south-east of 

 Babbinboon. 



WORTHENIA (?) CAXALICULATA Etll. fil. 



R. Etheridge, Jun., Rec. Geol. Surv. N.S.W., viii.. Pt. 3, 1907, p. 192, t. 38, f. 4. 

 This specimen was obtained at Carroll by D. A. Porter, and is in tlie collec- 

 tion of the Geological Survey. 



GOSSELETIXA AUSTRALis var. ALTA, var. nov. (Plate xxii., figs. 5, 0.) 



Gosseletina australis, Etheridge, Junr., Rec. Geol. Sur. N.S.W., ii., 1890, ji. 82; 

 ibid., vii., 1907, p. 192, t. 37, f. 6, 7, 8; t. 38, f. 7, 8. 

 This shell consists of four or five convex whorls; the spire is short and de- 

 pressed, and the height of the body whorl is slightly greater than the height of 

 the remainder of the shell. It is reg-ularly convex, almost circular in cross see- 



