166 
NOTES ON SOUTH AUSTRALIAN MARINE MOLLUSCA, WITH 
DESCRIPTIONS OF NEW SPECIES.- PART II. 
By Jos. C. Verco, M.D. (Lond.), F.R.C.S. (Eng.), etc. 
[From “Transactions of the Royal Society of South Australia,” 
vol. xxrx., 1905.) 
[Read April 4, 1905.} 
Prats XX XI. Ve A 
Calliostoma zietzi, spec. nov. Pl. xxxi., figs. 1, 2, 3. 
Shell small, conic, imperforate, moderately solid. 
Whorls 8, including protoconch of one smooth turn. First two 
spire whorls rounded and slightly mammillate, next three 
straight-sloping, last two rather convex. Suture moderately 
deep, slightly overhung by peripheral lira. Penultimate 
whorl with 6 spiral cinguli and 2 inter-liral threadlets. Body 
whorl with 6 cinguli, rather narrower than the interspaces, 
and 5 threadlets; barely angulated below its centre by a 
somewhat stouter cord; base rounded, with 8 concentric lire, 
flat, and much wider than the interspaces. Spire and base 
finely obliquely incised with growth lines, which cut the lire 
less than the interspaces. Aperture roundly quadrate. 
Columella nearly straight, slightly oblique and excavated, sub- 
truncate below; outer lip simple crenulated by cinguli. 
Height, 8 mm.; diameter of base, 5; aperture, 2°5. 
_ Ornament.—Horn-coloured, peripheral band white. Main 
cinguli on the Spire and those on the base obscurely dotted 
au light chestnut ; peripheral band with larger and plainer 
spots. 
Hab.—Backstairs Passage, St. Vincent Gulf, at’ 12, 17, 
and 20 fathoms; 9 dead. 
‘It is named after Mr. A. Zietz, F.L.S., of the Adelaide 
Museum. 
Gena terminalis, spec. nov. Pl. xxxi., figs. 4, 5. LO FL 
Shell minute thin oblong-oval, sides parallel. Whorls 4, 
spire terminal inconspicuous. Surface smooth and polished 
but for miscroscopic accremental lines; no spiral striz or in- 
cisions, except microscopic, on the base of the body-whorl. 
Colour white, with crowded spiral bands of cresventic white 
and dark and reddish-brown spots and blotches. Length, 
5°75 mm.; width, 3mm. Radula, ©7.1.(5.1.5.).1.c%., 36 rows. 
Hab.—Dredged alive, Wallaroo Bay, Spencer Gulf 15 
fathoms; also alive and dead in deep water, St. Vincent Gulf. 
Obs.—The ornament varies greatly. The shell may be 
blotched pink and white, and there may be numerous fine 
spiral, hair-like, dark lines, 

