295 



liemipleurotoma perksi, Verco. 



Surctda perksi, Verco, Trans. Roy. Soc, South Australia, vol. 

 XX., 1896, p. 224, pi. vii., fig. 3, a, b, and c. Type locality — "15 

 fathoms off Thistle Island, Spencer Gulf." 



liemipleurotoma vestalis, tledley. 



Daphnella vestalis, Hedley, Memoirs Austr. Mus.. iv., part 

 6, 1903, p. 390 fig. 106. "Taken in 24 and 52 fathoms, off Port 

 Stephens and Botany Bay." 



Dredged in 104 fathoms 35 miles south-west of Nep- 

 tune Islands, 2 good dead, 1 fragment. Identified by Hedley 

 from his type. 



As this shell has its siniis at the carina and has a short 

 canal, it has been placed in H emiplenrotoma. 



liemipleurotoma mayi, n. sp. PL xxv., tig. 2. 



Shell thin, oval, white, of 4 whorls besides a brown pro- 

 toconch of 2 whorls, which are convex, apparently smooth, 

 but under the microscope very finely spirally lirate and in- 

 terstitially punctate. Spire- whorls convex medially sharply 

 angulate with a cord, base contracted, and forming a moder- 

 ately long canal, which is slightly curved to the left. Sutures 

 distinct, finely canaliculate. Aperture obliquely oval ; 

 outer lip thin, simple, ridged outside by the spirals, with 

 an obtuse shallow, wide triangular sinus at the angulation. 

 Sculpture : above the angle are three spirals in each whorl, 

 and one below it ; in the body- whorl are eighteen, subdistant 

 just below the angle, crowded towards the canal. Very fine 

 axials, about 42 in the penultimate, run obliquely back from 

 the suture to the angle, and then at an obtuse angle ob- 

 liquely forward to the suture. 



Dim. — Length, 4"6 mm. ; of the body-whorl, 31 mm. ; 

 width, 2'4 mm. 



Locality. — Type in 104 fathoms, 35 miles south-west of 

 Neptune Islands, with 2 others dead. 



Diagnosis. — D. vestalis, Hedley, though described as 

 having a smooth protoconch, has it punctate spirally striate, 

 differs in being larger, more solid, more obese, not so sharply 

 angled, and in having a shorter canal, and fewer and more 

 solid axials. 



Variations. — One example has only one spiral above its 

 very sharp angle, namely, a bold cord just below the suture, 

 making this more channelled ; and only one below the angle 

 just above the suture in the second and third whorls, and 

 seven in the body- whorl. 



