192 Proceedings of tlie Royal Society of Victoria. 



1852. Natica papyracea, Philippi. Conch. Cab. (ed. 

 Kiister) vol. ii, p. 43, sp. 42^, pi. 5, f. 4, and 

 p. 87, sp. 99, pi. 13, f. 4. 

 1852. Natica bicolor, Philippi. Id., p. 43, sp. 42, pi. 6, 



f. 4. 



1852. Natica ampla, Philippi. /^., p. 41, sp. 40, pi. 6, f. 2, 



1855. Natica cheninitzii, Reeve. (From Recluz, m.s.), 



(non N. chemnitzii, PfeifFer). Conch. Icon., 



vol. ix., pi. 2, f. 7. 



1855. Natica lamarckiana. Reeve. (From Recluz, m.s.). 



Id., pi. 2, f. 6. 

 1855. Natica petiveriana. Reeve. (From Recluz, m.s.). 



Id., pi. 5, f. 17. 

 1855. Natica problematica. Reeve. Id., pi. 6, f. 21. 

 1875. Natica tasraanica, T. Woods. P.R.S. Tas., pp. 



148-149. 

 1883. Natica didyma, Sowerby. Thes. Conch., vol. v., 

 pts. 39, 40, p. 77, sp. 7, pi. 454 (1 gen.), £. 4, 

 and pi. 455, f. 14. 

 1886. Natica (Neverita) didyma, Watson. Chall. Zool., 



vol. XV., p. 450, No. 23. 

 1886. Natica ampla, Tryon. Man. Conch., vol. viii., 

 p. 32, pi. 10, f. 81, 82, 85, 86, and pi. 11, 

 f. 91, 93. 

 Hab. — Common at most of the sandy parts of our coast. 

 Obs. — Outside Victoria this species appears to have an ex- 

 tremely wide range, as, in addition to the whole Australian coast, 

 it is recorded as far north as China and Japan, also throughout 

 the Indian Ocean, and as a consequence the form of the species 

 is so variable as to have occasioned considerable confusion. 

 There seems to be no choice but to include the whole of the above 

 under one species when a considerable number of specimens are 

 considered in series. In the above reference to Tryon, figure 81, 

 refers to N. didyma, f. 82 to N. chemnitzii, f. 85 to N. papyracea, 

 f. 86 to N. lamarckiana, and on plate 11, f. 91 to N. petiveriana, 

 and f. 93 to N. problematica ; he also includes N. incisa, Dunker, 

 plate 10, f. 83, and N. vesicalis, Philippi, plate 11, f. 92, as 

 synonyms, but with these we cannot agree. 



