724 STUDIES ON AUSTRALIAN MOLLUSCA, xii., 



The history of Cymhiola is parallel to that of Scaphella. 

 Herrmannsen* ascribed it to the " Elements of modern Conch- 

 ology," 1835, though it really dates from 1832. Subsequent 

 authors have generally perverted it from the original intention. 

 At first presentation, iSwainson included the following Australian 

 species, C. marmorata, nivosa, rutila, pulchra, magnifica, and 

 Jlavicans. But in the "Treatise on Malacology," 1840, p.317, 

 Swainson gave a fresh definition and list of contents, shifting the 

 genus towards Adelomelon, to the misleading of his readers. 



I suggest that the Australian contents of the genus be grouped 

 thus; under Cymhiola restricted, irvince Smith, nivosa Lamarck, 

 nodiplicata Cox, ( = dannevigi Verco), oblita Smith, 2^erplicata 

 Hedley, pulchra Sowerby, and rutila Broderip. 



Under the subgenus Aulica : Jlavicans Gmelin, guntheri Smith, 

 kreuslerce Angas, magnifica Chemnitz, marmorata Swainson, 

 punctata Swainson, and verconis Tate. 



Under the subgenus Volutoconus : hednalli Brazier, and coni- 

 formis Cox. 



Ericusa. 

 Ericusa H. & A. Adams, Genera Rec. Moll, ii., 1858, p. 6 19, 

 ioT fulyetrum, Sowerby, s^nd papillosa Swainson; Scaphella Gray, 

 Brit. Mus. Cat., Volutidse, 1855, p.20 (not Swainson). 



Swainson was oppressed by a craze for arranging species and 

 higher groups in quintettes and circles. Probably both Scaphella 

 and Cymhiola had a heterogenous content on purpose that they 

 might till a place in the Quinary System. The group of Ericusa, 

 though recognised by systematists, long lacked a name because 

 Swainson placed its members as aberrant Scaphella^ and Gray 

 reconstituted Scaphella to receive them. The names of Ericusa, 

 Livonia, and Mamillana have been uniformly omitted from 

 Zoological Indices. A Voluta fusi/ormis was, in 1814, proposed 

 by Brocchi,! so for the Australian shell named Voluta fusi/ormis 

 by Swainson in 1822, it will be necessary to resume the name 

 Voluta sowerhyi of Kiener, 1839. 



* Herrmannsen, Indicia Generum Malac, i., 1846, p.352. 

 t Brocchi, Conch, foss. sub., 1814, p,315. 



