24 



PLACOSTYLUS, NEW ZEALAND. 



f. 8), and a copy of it in Favanne (pi. 65, f. v), which does not 

 represent a Placostylus, but probably an Amphidromus,SLnd to figures 

 in Chemnitz's Conchylien Cabinet which represent a form of Placo- 

 stylus fibratus. 



Melania aurantia Perry (Conchology, pi. '29, fig. 1, 1811). has 

 been referred to this species as a synonym, largely because Perry 

 gives the locality " New Zealand." The figure represents a short 

 species with strong columellar fold, and is totally incompatible with 

 B. shonyi. I cannot identify it with anything not a rare dilemma 

 in dealing with Perry's preternatural!}' bad figures. 



Professor Hutton has figured the jaw and teeth of this species. He 

 was also the first to unite B. novoseehmdice Pfr. as a variety or syn- 

 onym. There are several errors in the bibliographic references given 

 by Suter and Kobelt. 



Bulimns antipodarum Gray (DiefTenbach's New Zealand, ii, p. 247, 

 1843) was formerly thought to be a young specimen of P. shongi, but 

 recent investigations by Mr. Suter have shown it to be a young Heli- 

 costyla, probably H. fulgetrum. Gray's type has been figured by Mr. 

 E. A. Smith in the Zoology of the Voyage of H. M. S. Erebus & Ter- 

 ror, Mollusca, p. 3, pi. 1, fig. 5, under the name "Bulimus antipodum." 

 It was said to have been procured at Kaitaia, N. Z., by Dr. Dieffen- 

 bach. 



Var. NOYOSEELANDICUS (Pfr.). 



Shell imperforate, ovate-oblong, solid, irregularly rugose-striate ; 

 tawny-brown, here and there streaked with chestnut; spire ovate- 

 conic, flesh-colored above, the apex rather acute, suture uneven, 

 widely white-margined. Whorls 6, moderately convex, the last as 

 long as the spire, somewhat attenuated basally, columella. vertical, 

 scarcely twisted. 



Aperture subvertical, rhombic-gem ioval, buff-whitish inside; peri- 

 stome thickened, white , the margins joined by a whitish callus, the 

 right margin a little expanded, slightly arcuate above, very feebly 

 sinuated within ; basal lip forming an angle with the dilated, adnate 

 columellar margin. Length 77, diam. 31, aperture 35 mill, long in- 

 side, 15 wide. (Pfr.) 



Whangaruru, Bay of Islands (Hochstetter) ; Whangarei (Suter). 



Bidimus novoseelandicus PFR., Malak. Bl. viii, p. 149 (1861); 

 Monogr. Hel. Viv. vi, p. 83. CKOSSE, Journ. de Conchyl, 1864, p. 



