704 STUDIES ON AUSTRALIAN MOLLUSCA, xiil., 



I suppose that in forming Plocamotis, Fischer was misled by 

 a defective sketch of Arthur Adams, and that it is an absolute 

 synonym of Gena. 



ScuTus ASTROLABEUS, nom.mut. 



Parmophorus australis Quoy & Gaimard, Zool. Astrolabe, iii., 

 1834, p.321, PI. 69, figs.1-4; Id., Menke, Moll. Nov. HolL, 1834, 

 p. 33 (not F. aust7-alis Lamarck, An. s. vert., vi., (2), 1822, p.5; 

 nor P. australis Riippell, Reis. N. Afrika Moll., 1828, p.37). 

 Scutus elongatus Sowerby, Thes. Conch., iii., 1863, p. 226, PI. 249, 

 fig. 10. 8. anatinus var. "b" Smith, Journ. of Conch., ii., 1879, 

 p.237. 



From King George's Sound, West Australia, the zoologists of 

 the Astrolabe Expedition described a large species of Scuttis, 

 the shell of which is broader and flatter than the others. The 

 name they used had previously been employed by Lamarck for a 

 compound of the East Australian "antipodes" and the New 

 Zealand "breviculus." This was reduced to the rank of a 

 variety by Smith in 1879, and by Pilsbry in 1890. Now 

 estimated as the Adelaidean representative of the Peronian 

 antipodes, and restored to specific rank, it needs this fresh name. 



ScUTUS ANTIPODES Montfort. 

 (Plate xlvii., figs.7, 8, 9.) 



Scutus antipodes Montfort, Conch. Syst., ii , 1810, p. 59, PI. xv. 

 Patella ambigua Dillwyn, Cat. Recent Shells, ii., 1817, p. 1053 

 (not P. ambigua Gmelin, Syst. Nat., xiii., 1791, p. 3255). Scutus 

 anatinus Smith, Journ. of Conch., ii., 1879, p. 258; Id., Tate, 

 Journ. Roy. Soc. N.S.W., xxvii., 1893, p. 185; Id., Shirley, Proc. 

 Roy. Soc. Q'land, xxiii., 1911, p. 96. Parmophorus elongatus 

 Blainville, Bull. Soc. Philom., 1817, p. 25, and Malacol., 1827, 

 P1.48, fig.2; Id., Angas, Proc. Zool. Soc, 1867, p.219; Id., Ten.- 

 Woods, Proc. Roy. Soc. Tasm., 1877, p. 44 (not P. elongatus 

 Lamarck, 1801). Parmophorus co7ivexus Quoy &. Gaim., Zool. 

 Astrolabe, iii., 1834, p. 322, P1.69, figs.5-16; Id., Forbes, Voy. 

 Rattlesnake, ii., 1852, p. 362. Parmophorus tumidus A. Adams 

 Proc. Zool. Soc, 1851 (1853), p. 222. Parmophorus australis 



