A Review of the Land Mollusca of Western Australia. 
45 
FAMILY HELICARIONIDAE. 
Thi.s family is based on Tasmanian and Eastern Australian inolluses, 
which, thoug'h slugliko in form, still retain a thin semi-circular thin shell. 
Many species are known, extending as far north as Cape York, and cxtra- 
Ihnital species north of that place have been included. None is known from 
North-West Austr'ulia, while a single siiecies is included from South-M est 
Australia, although the group is absent from South Australia. 
The local form has a shell (pnie unlike that of the Tasmanian and A^ic- 
torian species, but apparently has a black animal like that of the latter, as 
Quoy and Gaiuutrd recorded it under the name \'itrina nigra, which they in- 
troduced on account of the black colour of the animal. 
Genus LUINARION Iredale 193.3. 
1933 — Lttinarion Iredale, Rec. Austr. Mus., Vol. XIX., p. 38, Aug. 2. Haplo- 
type Helicarion thomsoni Ancey = Vitrina eastanea Pfeiffer. 
Luinarion was introduced as a subgenus of Helicarion, but it seems to 
stand further apart, as the shell is so unlike that of other Australian Heli- 
carionids that it has not been recognised up to the present although described 
eighty years ago. 
Shell with the spire a little elevated, smooth, somewhat clepressedly glo- 
bose, mouth large, open, subcircular, outer lip, sinuate, I'eceding ba.sally, base 
convex, columella arched, a little reflected. Shell fragile. 
Luinarion castaneus Pfeiffer 1853. 
Plate III., fig. 1. 
1832 — Vitrina nigra Quoy and Gaimard, AYy. de I’Astroh, ZooL, Vol. II., 
p. 130, part only (AYestern Port, A^ictoria) and King George’s 
Sound, AVest Australia. 
1853 — Vitrina caslanra Pfeiffer, Mon. Ilelic. Anv., A^ol. III., p. 5, (pref. 
Alay) Australia. 
1854 — Vitrina ca»tanea Pfeiffer, Proc. Zool. Soe. (LoncL), 1852, ]). 56, Alch. 
22, 18.54. Australia. 
1854 — Vitrin-i castaina Pfeiffer, Syst. Conch. Cab. (Alart. & Chemn.), od. 
Kuster, Rd. L, Abth. XI., p. 24, pi. 6, figs. 1-4. Australia (in my 
collection). 
1862 — Vitrina eastanea Reeve, Conch. Icon., Vol. XIIL, pi. VI., sp. 37, May 
(ex AYrreaux in Mu.s. Cum. “chestnut olive”). 
1868 — Vitrina eastanea Cox, Mon. Austr. Land Shells, p. 84, pi. XIA^., 
fig. 11, May, coiiic'd from Reeve (colour all wrong). 
188.5 — Helicarion eastaneiis Tryon, Alan. Conch., Ser. II., AYl. I., p. 169, 
pi. 38, fig. 41, July 3. Had copy of Pfeiffer’s coloration. 
1889 — Helicarion tliomsoni Ancey, Le Naturaliste, 1889, p. 19. Geographe 
Bay, Soufh-AA’est Australia. 
189.5 — Helicarion thomsoni Iledley, Proc. Alalac. Soc. (Lond.), Vol. I., 
p. 260. 
1910 — Helicarion thomsoni Hedley Journ. Roy. Soe. AA^est Austr., AYl. L, 
p. 220 (71 in separate). 
Quoy Gaimard wrote “Le port du Roi Georges nous a fourni des 
individus plus petits, (than the Victorian species), vivant sous les arbres. 
