307 



Gibbula reedi, i' sp. PL xxix., tig. 5. 



Shell solid, depressed conoid. Whorls, 4 smooth, llatly 

 convex, slightly hollowed just below the suture. Summit 

 blunt. Suture impressed. Periphery round, barely angu- 

 late. Base convex. Umbilicus moderate. Aperture oblique, 

 roundly elliptical; outer lip simple, bevelled inside; a short 

 thin glaze on the base of the whorl ; columella arcuate, evert- 

 ed posteriorly, with a tiny notch where it joins the round 

 basal lip at the end of the bordering lira of the umbilicus; 

 throat smooth and iridescent. Sculpture : the dorsum looks 

 as though it were spirally Urate, but is really quite smooth 

 except for very fine miscroscopic curved retrocurrent accre- 

 mental scratchings. On the base are about a dozen fine spiral 

 incisions, with radial scratch-marks more valid and distant 

 than on the dorsum ; these are still stouter and wrinkling 

 within and near the i>erforation. An inconspicuous lira bor- 

 ders the umbilicus, which has a shallow groove just above it. 

 Colour, chestnut-brown, with dark-brown spiral hair-lines of 

 varying width; dotted with tiny white spots, which, below 

 the suture, are aggregated into small pyramidal blotches with 

 their apex upward, six in the body-whorl. A white band, 

 scalloped on both edges of these aggregated dots, encircles the 

 periphery. An articulated white-and-brown spiral orna- 

 ments the lira bordering the umbilicus, a second lies just out- 

 side this, and another with more distant double white spots 

 beyond; the rest of the base, which is of a lighter tint than 

 the dorsum, has scattered tiny white dots. The umbilicus is 

 w^iite. Over all is a transparent glaze, with a bronze reflex. 



Dim. — Greatest diameter, 6*2 mm. ; smallest, 5 mm. ; 

 height, 3 mm. The species may reach 7*2 mm. 



Locality. — The beach. Holdfast Bay (Tate) ; Leven's 

 Beach, Yorke Peninsula (Zietz). It seems to be quite lit- 

 toral. I have not dredged it. 



There may be a faint gutter where the labrum joins the 

 body-whorl. The colour may be dark-brown. The peri- 

 pheral white band may fade out toward the aperture. The 

 white blotches beneath the suture and the articulated bands 

 around the perforation seem the most constant ornament. 



It was formerly called in South Australia Gibbula Fe.<- 

 serida, Ten. Woods, and was so catalogued as No. 348 in Ad- 

 cock's Handlist of the Aquatic Moll, of South Australia, 

 1893, but his species has been recognized as an immature 

 Diloma Adelaidce, Philippi. 



It has been named after Mr. Walter Reed, a South Aus- 

 tralian collector, who took it on our shores. 



