185 



Sistrum purpuroides, Johnston (sp.). 



1880. Richiida jmrpnroides, Jolinston, Pap. Roy. Soc. Tas. 1879, p. 33. 

 1888. Tisania purpuroides, Tate, Traus. Eoy. Soc. South Aust. vol. s, 



p. 165, pi. xi. fig. 6. 

 18S9. Latirus purpuroides, Cossmann, Ann. Geol. Univ. t. v. p. 1090. 

 189-J. Eicinula purpuroides, Tate, Journ. Roy. Soc. N.S.W. vol. xxvii. 



p. 173. 

 1896. MiciiiHla purpuroides, Pritchard, Proc. Roy. Soc. Vict. vol. viii. n.s. 



p. 90. 



The specimens in the Museum collection are not well preserved, 

 the phenomena of the aperture (the most distinctive character of 

 the genus) being incomplete. In reference to the latter, Professor 

 Tate remarks^: "Aperture narrowly ovate; outer lip varicosely 

 dilated behind, slightly crenulated on the acute margin, and with 

 seven tooth-like ridges within ; inner lip spreading over the 

 columella and thinly continuous with the outer lip, with one 

 elongated plication near the posterior angulation, and about eight 

 small irregular callosities thence to the point of the pillar." 



These features are not characteristic of Pisania or Latirus, but 

 of Si drum. 



Dimensions. — Length 11 mm. ; breadth 6 mm. 



Form, and Loc. — Eocene : Table Cape, Tasmania. 



G. 9492. Two examples. Purchased. 



Family LOTOEIID^. 



Genus LOTORIUM, Moutfort. 

 [Conch. Syst. t. ii. 1810, p. 583.] 



Tritonium, Link, Besch. Rostock, vol. iii. 1807, p. 121 {non 



Miiller, 1776). 

 Triton, Moutfort, Conch. Syst. t. ii. 1810, p. 587 {non Linnasus, 



1767). 

 Monoplex, Perry, Conchology, 1811, pi. iii. {in partem). 

 Zamjjiwa, Schumacher, Essai jS^ouv. Syst. Habit. Testaces, 1817, 



pp. 76, 250. 

 Zuterium, Herrmannsen, Indicis Generum Malac. vol. i. 1846, 



pp. 625, 626. 



' Trans. Eoy. Soc. South Aust. vol. x. 1888, p. 165. 



