BOTHRIEMBRYON. 7 



45, fig. 1, a young shell of 2^ whorls, and 4.3 mill, greatest diameter, 

 showing nepionic shell and first whorl of the neanic stage, with spiral 

 cuticular threads); the succeeding whorl showing fine raised cuticular 

 spirals in young, un rubbed shells. Whorls slightly over 4, quite 

 convex, the last one inflated. 



Aperture oblique, ovate, brown within; outer lip thin and simple, 

 the columella rather broadly refiexed above, nearly closing the per- 

 foration. 



Alt. 19, diam. 13.5, longest axis of aperture 11.3 mill. 



Alt. 17.6, diam. 13, longest axis of aperture 11.3 mill. 



Alt. 20, diam. 12.5, longest axis of aperture 11.5 mill. (type). 



Central Australia : Glen of Palms, by the junction with Palm 

 Creek, burrowing in loose earth under the shade of fig trees (Tate). 



Liparus spenceri TATE, Trans. Roy. Soc S. Australia, xviii, p. 

 192 (1894); Rep. Horn Exped. to Central Australia, pt. 2, Zoology, 



p. 202, pi. 18, f. 13 (1896) HEDLEY, t. c., p. 226, f. N (jaw), O 



(teeth), P (genitalia). 



Similar in shape to the short and broad variety of B. inflatus, but 

 differs by its thin shell, more convex whorls, and oblique, wider 

 aperture, as well as by the entirely different sculpture of the em- 

 bryonic whorls, which resembles that of B. gunni, though the riblets 

 are much more widely spaced. The figures are from part of the 

 original lot, kindly sent by Professor Ralph Tate. 



B. KINGII (Gray). PL 2, figs. 21 to 28. 



Shell narrowly perforate, oblong-ovate, the diameter varying from 

 slightly more than half, to less than half the length of the shell; 

 thin, sometimes strong and solid but usually weak and brittle. 

 White, cream-tinted below, sparsely or copiously streaked with 

 strongly contrasting dark chestnut stripes, or with pale, grayish, 

 translucent stripes; rarely uniform straw tinted, or with the stripes 

 split into lines ; a dark umbilical patch generally present. Surface 

 hardly shining, rather irregularly striated, the striae stronger near 

 the suture, somewhat decussated by spiral incised lines on the spire, 

 but not so on the last whorl. Spire long, conic, the apex obtuse, 

 corneous, If to over 2 earlier whorls with pitted sculpture, the pits 

 very fine, distinct, arranged in longitudinal rows (pi. 4, figs. 77, 78). 

 Whorls 5-| to 5|, slightly convex, the last either tapering or some- 

 what saccate below. Aperture small, white or purplish-brown 



