66 



height and lengtli of aperture, 10 ram. ; diameter 



alt., 12 mm. ; 



of umbilicus, 'j, mm. 



This species is allied in its general characters to many South 

 Australian congeners, and is also ornamented with the rufous 

 bands so peculiar to the most of them, but is specially remarkable 

 for the very effuse dilatation of the outer lip, more particularly 

 so where it reaches the base of the shell. 



Birksgate Range ; under fig-trees amongst granite boulders. 



The following anatomical notes are furnished by Mr. 0. Hedley, 

 F.L.S., of the Australian Museum : — 



Two shells, containing the snails of lladra Elderi, Bednall, 

 were examined. The animals were much attenuated, and had 

 evidently been captured during the course of a long fast. The 

 aperture was sealed by a tough leathery epiphragm, behind which 

 was packed a mass of congealed mucus, the snails having retired 

 more than half-a-whorl within the shell. Though the shells indi- 

 cated mature individuals, the genital system was shrunk into the 

 condition of a half-grown animal, the consequence probably of 

 starvation. I was therefore unable to make any observations 

 upon this portion of their anatomy. 



The jaw (pi,. I, fig. 4) is rather wide, boomerang-shaped, 

 crossed by seven stout ribs whicli denticulate the concave but not 

 the convex margin, ends rounded. 



Radula (pi. I., fig. 5) strap-shaped, measuring 6x2 mm ; 

 formula 28 : 12 : 1 : 12 : 28. Rachidian cusp single, ovate-lanceo- 

 late, apex projecting beyond the basal margin ; base broadly 

 expanded anteriorly. Immediate laterals larger than the 

 rachidian, cusps stout ovate, the tips overlapping the base ; alate 

 angle of the base expanded. In the remoter laterals the cusps 

 grow more slender, and the bases diminish. Transition teeth 

 show a distal accessory cusp budding from the base of the main 

 cusp ; then a proximal cusp appears near the summit of the main 

 cusp. In the marginals these accessory cusps increase relatively 

 while the teeth diminish in size till 

 trifid Wades. 



JjULIMUS dux, Pfr. 

 (Proc. Zool. Soc, p. 24, 1861 ; Cox, Monograph Australian Land- 

 shells, p. 74, pi. xiii., fig. 4.) 



A dull whitish shell, nearly two inches in length, with the in- 

 terior tinged with pale pink. No specimens taken alive. 



Fraser Range (Elder Expedition) ; also King George's Sound 

 (Masters). 



BULIMUS MELD, Quoy et Gaimard 



(Voy. d' Astrolabe, Zool., vol. II., p. 110, pi. ix., fig. 6-7; Cox, 



Monograph Australian Land-shells, p. 74, pi. xiii., fig. 6.) 



the extreme marginals offer 



