12 BOTHRIEMBRYON. 



striated, surrounded by spiral decussating lines, giving the surface a 

 rough granular appearance on the upper half; whitish, with numerous 

 deeply-reddish longitudinal irregular bands and blotches ; spire very 

 short, broadly conical, obtuse, suture crenulated ; whorls 4, rather 

 convex, last much inflated, longer than the spire ; aperture elliptic- 

 ally-ovate, reddish-brown, and cloudy within ; peristome simple, 

 acute, columeilar margin white, expanded and reflected, covering 

 and nearly concealing the narrow perforation. (Cox.) 



Length 0.85, breadth 0.6 inch : [ = 21.2, 15 mill.] (Cox, type.) 



Length 0.8, breadth 0.55, length of aperture 0.55, width 0.3 inch 

 [ = 20, 13.7, 13.7, 7.5 mill.] (Cox.} 



Western Australia : Dirk Hartog Island (Capt. Onslow, "Gazelle" 

 Exped., J. J. Walker). 



Bulimus onslowi Cox, Ann. and Mag. Nat. Hist. (3), xiv, 1864, 

 p. 185; Catal. Austr. Land Shells, p. 24 (1864); Monogr. Austra- 

 lian Land Shells, p. 74, pi. 13, f. 13 PFR., Monogr. Hel. Viv. vi, 



p. 113. Buliminus (Liparus) onslowi Cox, MARTENS, Monatsber. 

 K. P. Akad. Wissensch. zu Berlin, 1877, p. 279 (1878) Bulimus 

 (Liparus) onslowi Cox, E. A. SMITH, Proc. Malac. Soc. Lond. i, p. 

 95, pi. 7, f. 28, 29. 



One and one-half apical whorls, in the small form (pi. 4, fig. 75), 

 show a dense sculpture of crimped or zigzag wrinkles, much as in 

 Rhinus pubescens Moric., the pattern being very much more minute 

 than that of members of the B. injlatus group. Mr. Smith remarks 

 of the specimens collected by Mr. Walker: "They are adult and 

 larger than that figured by Cox, which has the appearance of being 

 somewhat immature. The largest is 24 mill, long and 16 in diam- 

 eter, aperture 14 mill, in length, 8 wide" (fig. 48). 



" Five other examples are considerably smaller, averaging only 15 

 to 18 mill, in length. They are a trifle less globose, and more 

 strongly granular just below the suture" (fig. 47). Apparently 

 adult specimens (pi. 3, figs. 45, 46) of this small form before me are 

 even smaller than the dimensions given by Mr. Smith, two measur- 

 ing : Alt. 13.5, diam. 9, longest axis of aperture 8 mill., whorls 4^ ; 

 and alt. 14.5, diam. 8.2, longest axis of aperture 8 mill., whorls a 

 trifle over 5. They are strongly granose below the suture, and 

 striped longitudinally with pale reddish or gray and opaque white. 

 This small form may be called var. minor. 



Figures 43, 44 are copies of Cox's original illustration. 



