Ikedale — Suter's "Manual of the Ntw Zealand Mollusca.'' 445 



included the foregoing in our genus Marmarostoma, but we intend to limit 

 that name to the umbilicated division of Humphrey's Senectus, represented 

 by the M. versicolor (Turbo versicolor Martini, pi. 176, figs. 1740, 1741)." 

 Such a transposition of names is not permissible, and the first usage of 

 Marmorostoma prohibits its use in any connection, as it falls as an absolute 

 synonym of Turbo s. str. In Trans. N.Z. Inst., vol. xxxviii, 1905, p. 324 

 (1906), Suter wrote, " The subgenus Lunella Bolten, 1798, used by Webster, 

 should be replaced by Marmorostoma Swainson, 1840, as most conchologists 

 reject the names proposed by Bolten." At the present time the converse 

 is the case, as practically every systematist now recognizes the Boltenian 

 genera. The chief antagonist (Mr. A. J. Jukes- Browne) of the Boltenian 

 genera has recently passed away, and I at present know of no other 

 opponent. 



Lunella Bolten (Mus. Bolten., p. 103, 1798) can therefore be used instead 

 of the doubly invalid Marmorostoma Swainson, 1840, which, if quoted in 

 the synonymv, should be accompanied by the words " not of Swainson, 

 1829." 



Turbo smaragdus (Martyn, 1784). [P. 162.] 



To the synonyny of this species add (Helix) Smaragdus minor Martyn 

 (Univ. Conch., vol. ii, pi. 74, 1784), Turbo smaragdinus Bolten (Mus. Bolten., 

 p. 86, 1798). 



I notice with pleasure that Suter has also included Turbo smaragdus 

 var. tricostatus Hutton, 1884. My own collecting led me to endorse Suter's 

 suggestion (Trans. N.Z. Inst., vol." xxxviii, 1905, p. 324, 1906) that " further 

 investigation will show that all young shells of T. helicinus (= smaragdus) 

 are tricostate." The plate given by Martyn, and named as above, shows 

 two beautiful paintings of half-grown shells which clearly portray the tri- 

 costate stage, and if such had been separable Marty n's name, given just 

 one hundred years before Hutton's choice, would have claimed usage. 



Another synonym, which I will later discuss, seems to be Omalogyra 

 bicarinata Suter (Proc. Mai. Soc. (Lond.), vol. viii, p. 33, 1908). 



Argalista gen. no v. [P. 164.] 



I propose this generic name for Cyclostrema fluctuata Hutton. This 

 species, along with Leptothyra crassicostata Murdoch, belongs to a group 

 confused with Leptothyra and Collonia. The true species of Leptothyra 

 are very different shells, with different opercular characters. Collonia is 

 a name that has been recently restricted to fossil shells somewhat recalling 

 Argalista, but the name is so uncertain that it cannot be here recommended 

 for usage. 



I have before me new species of Argalista, and Hedley has described 

 Liotia latebrosa in 1907 (see under Leptothyra imperforata Suter, ante) and 

 more recently Leptothyra fug itiva (Zool. Pes. Fish. Ex. " Endeavour," pt. i, 

 p. 102, pi. 18, figs. 18-20, 1911), which probably, with Teinostoma rotatum 

 Hedley (Mem. Austr. Mus., iii, p. 553, fig. 65 in text, 1899) and many other 

 species, would fall into the present genus. 



Astraea sulcata (Martyn, 1784). [P. 167.] 



As a synonym, add Cidaris novaezeelandiae Bolten (Mus. Bolten., p. 85, 

 1798). This name is given to Der neuseelandische Turban (Chemn., 5, 

 t. 164, fig. 1550). The figure is numbered 1551, and is easily recognizable. 



