Reference List of South African Non-marine Mollusca. 285 
Hab. Transvaau. Pretoria (fide M. & P.). 
Founded on a single specimen, “seemingly allied to P. pre- 
toriensis’’ (M. & P., 1908). 
JAMINIA PSICHION (Mely. & Pons.). 
1894 Pupa psichion, M. & P., A.M.N.H. xiv. p: 93. pl. 1, £. 8. DF. 
1908 i; . - tp. ol, aN. 
1911 x »,  Bnp., A.M.N.H. vii. p. 409. N. 
Hab. Transvaau. Pretoria (fide M. & P.). 
It appears advisable to transfer both the foregoing to the list of 
doubtful species. J. haploa was founded on a single specimen, 
which can only be regarded as lost, since it has proved quite 
impossible to trace its whereabouts. In the case of psichion, the 
type, the only known specimen, is so hopelessly broken that it is 
quite impossible even to determine to what group of the Genus it 
belonged. The original descriptions and figures of these minute 
forms are hardly in themselves sufficient, and the Pretoria District, 
whence they were recorded, has since been often carefully searched, 
and yielded only the species mentioned on pp. 180-185. It is 
probable that, if ever the missing type of haploa or co-types of 
psichion turn up, they will prove to be identical with some forms 
already named; meanwhile no useful purpose can be served by 
retaining them in the list of collectible varieties. 
RUMINA DECOLLATA (Linné). 
1758 Helix decollata, Lin., Syst. Nat., Ed. 10. i. De tide 
1898 Rumna _,, a Mid PE vEroc.oMal.Soc: iin, 184. -J:. 
Hab. Cape or Goop Hors. Port Elizabeth (coll. Layard). 
In the Layard collection were two large examples of this species, 
found at Port Elizabeth in 1897. There is no record of their having 
been taken alive, and it is hardly possible that this destructive pest 
would have gained a footing in the country so many years ago 
without making its presence felt ere now. It is reasonable to 
suppose, therefore, that these shells, on which the South African 
record of f. decollata is based, were imported in dead condition, 
probably in flower-pots, and the name may be expunged from the 
South African list until, as is to be feared, a second, and more 
successful, invasion takes place. 
AURICULASTRA PELLUCENS (Menke). 
1830 Auricula pellucens, Mke., Syn. Meth. Moll. putaks wD. 
1848 x »  Kyrs., Stidafr, Moll. pees. NN, 
