Reference List of South African Non-marine Mollusca. 285 



Hab. TBANSVAAL. Pretoria (fide M. & P.). 



Founded on a single specimen, " seemingly allied to P. pre- 

 toriensis" (M. & P., 1908). 



JAMINIA PSICHION (Melv. & Pons.). 



1894 Pupa psichion, M. & P., A.M.N.H. xiv. p. 93. pi. 1, f. 8. D.F. 



1908 ,, i. p. 81. N. 



1911 ,, Bnp., A.M.N.H. vii. p. 409. N. 



Hab. TRANSVAAL. Pretoria (fide M. & P.). 



It appears advisable to transfer both the foregoing to the list of 

 doubtful species. /. 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 fche 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. 



EUMINA DECOLLATA (Linne). 



1758 Helix decollata, Lin., Syst. Nat., Ed. 10. i. p. 773. D. 



1898 Eumina ,, M. & P., Proc. Mai. Soc. iii. p. 184. L. 



Hab. CAPE OF GOOD HOPE. 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 Pi. 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. 



AUEICULASTBA PELLUCENS (Menke). 



1830 Auricula pell ucens, Mke., Syn. Meth. Moll. p. 131. D. 

 1848 ,, Krs., Siidafr. Moll. p. 82. N. 



