135 



the charactefistic Queensland operculates, Pupina and Helicina, 

 present. xVmong the inoperculates the Placostylus claims affinity 

 with the New Zealand and New Caledonian forms, and utterly 

 repudiates kinship with Australian life. 



1. Nanina soPHiiE, Gaskoin, 1854. 



Illustrations. Reeve, Conch. Icon, vii., pi. 196, fig. 1377; 

 Cox, P.L.S., N.S.W., ser. 2, Vol. ii., pi. 20, tigs. 8, 9 ; Tryon, 

 Man. Conch, ser. 2, Yol. ii., pi. 16, fig. 2G. 



Descriptivns. Gaskoin, P.Z.S., 1854, p. 152; Pfr., Mon. Hel. 

 Viv., Vol. iv., p. 59 ; Tryon, Man. Conch., 2-2-83. 



Tyj)e. British Museum. (?) 



Hal). The lower and wooded portions of the island, where it is 

 plentiful. 



var. CONICA, Brazier, 1889. 

 Illustration,. Brazier, Aust. Mus. Mem., 2, pp. 26, 29, pi. 5, 

 tigs, 5, 6, (reversed). 



Type. Australian Museum. 



Ilab. Rabbit Island ; plentiful under stones. 



Shell smaller and more elevated than the type, globosely conical, 

 scarcely perforate, base rounded. Diam. maj. 25, min. 23, alt. 

 19 mill. Jaw (pi. xxi., tig. 3) lunate, with central rostriform limb, 

 smooth, ends rounded. Radula (pi. xxii., fig. 7) tongue-shaped, three 

 times as long as broad ; formula, 140 rows of 70 : 26 : 1 : 26 : 70 ; 

 the rows are nearly straight in the centre of the ribbon, the 

 laterals curving back slightly from the centre, after the transition 

 teeth are passed the marginals sweep back in a parabolic curve ; 

 the rachidian possesses a slender lanciform cusp whose apex barely 

 surpasses the basal plate, at one-third of its length it is furnished 

 with two small auxiliary cusps ; the laterals are slightly larger 

 than the rachidian and equal each other in size, alate angle of 

 basal plate hardly expanded, the inner accessory cusp is suppressed 

 and the main cusp just surpasses the base of attachment ; the 

 marginals succeed three or four transition teeth, they are minute, 

 diminishing rapidly, cusp bicapitate, base bisinuate. 



2. N. HOwiNsuLiB, Cox, 1873. 



Illustration. Cox, P.L.S., N.S.W., ser. 2, Vol. iv., pi. 19, figs. 

 10, 11. 



Descriptions. Cox, P.Z.S., 1873, p. 140; Pfr., Mon. Hel. Viv., 

 Vol. vii., p. 205. 



Type. The original of the description is in the Cox Collection, 

 that of the figure in the Australian Museum. 



Hab. Replaces the preceding species on the summit of the 

 mountains. 



