310 



nounced columellar fold, and the absence of the colour-pat- 

 tern. 



Variations. — One shell is somewhat more ventrico&e, 

 another more elate, with more valid axial strige ; the former 

 has two faint rusty blotches of colour on the dorsum of the 

 body-whorl, a little below the suture; the latter has the trace 

 of a pinkish tinge. 



Pupa intermedia, Angas. 



Buccinulus intermecUus, Angas, Proc. Zool. Soc, London, 

 1878, p. 862, pi. liv., f. 11. Type locality. Aldinga. 



Adoock, Handlist of Aquatic Moll, of S. Austr., 1893, p. 10, 

 No. 424. 



Solidula intermedia, Angas, Pilsbrj-., Man. Conch, vol. xv., 

 1893, p. 145. pi. xxA, figs. 55, 56. 



It has been dredged dead in Hardwicke Bay, Spencer Gulf, 

 Investigator Strait, St. Vincent Gulf, and Backstairs Passage, 

 at all depths from 14 to 22 fathoms, and at 62 fathoms N.W. 

 of Cape Borda. It has been taken alive at 15 fathoms. Inves- 

 tigator Strait. 



It exhibits the following variations : — The middle third 

 of the body-whorl may be slightly concavely compressed. The 

 axial sculpture may vary from microscopic accremental striae, 

 just punctating the spiral incisions, when these are narrow, 

 or crenulating their edges when wider, up to fairly well- 

 marked oblique striae, which divide the wide incisions into 

 squarely-rounded shallow pits, and cross the intervening flat 

 riblets. The spiral incisions may be equidistant all over the 

 body-whorl, or absent from the upper half of the body-whorl, 

 or they may be trebly distant here. They may be merely very 

 fine and shallow punctate engravings, or rather wide furrows 

 with crenulated edges, or latticed into squarish pits. But 

 all variations grade into one another. 



Pupa hyalina, n. sp. PI. xxix., fig. 11. 

 Shell minute, diaphanous, fusiforml}^ oval, five whorls. 

 Protoconch distinct, glassy, smooth. Suture adpressed. 

 Whorls slojDing, convex. Aperture narrow, long, and pyri- 

 form. Outer lip uniformly curved, simple, thin, continued 

 into a round basal lip, which is thickened towards the colu- 

 mella. The inner lip is a thin glaze over the body- whorl, and 

 is expanded slightly beyond the pillar over the perforation. 

 There is a curve of the columella forming a plait running into 

 the basal lip, and a second well-marked oblique plait where 

 the pillar joins the body-whorl. The spire-whorls have sub- 

 lenticular wavy spiral incisions, which also cover the body- 

 whorl, being most marked at the base, and nearly as well 

 marked below the suture. Very fine, rather sinuous, accre- 

 mental striae. Colourless. 



