77 



17. Area avellana. St. Peter and St. Francis Isles. 



18. Perna nucleus. St. Peter and St. Francis Isles. 



19. Pasciolaria coronata. Kangaroo Island. 



20. Buccinuni fasciatum. St. Peter and St. Francis Isles. 



[= Nassa fasciata.] 



The number of the bivalves is reduced to sixteen by exclusion 

 of names considered synonymic ; the following are recognised 

 as inhabiting our waters : — Crassatella cuneata, Saxicava aus- 

 tralis, Yenerupis distans, Tellina albinella, T. capsoides, T. deltoid- 

 alis, Donax deltoides, D. cardioides, Venus aplirodina ; the 

 remaining seven are either indeterminate species, or if denned 

 species then not certainly known to occur in South Australia. 

 That the names of localities have in some instances been mis- 

 quoted is very certain. Of the six Lamarckian types of 

 Psammotea Candida in the Paris Museum, Yon Bertin says that 

 one is labelled from Timor, one from China, and four are 

 without localities. Nevertheless, though we may cast a doubt 

 as to the accuracy of the record of observation, yet we should 

 hesitate to reject in toto ; for eighty years Donax cardioides had 

 remained unobserved in the region whence it was first 

 obtained. 



The late Mr. Cuming extended bis collecting tour to our 

 waters, and many new species then obtained by him have been 

 described by Reeve, Sowerby, Adams, and other monographers. 

 The Cumingian collection, on the death of its founder, was 

 acquired by the British Museum. 



As a result of several years' personal collecting in this pro- 

 vince, Mr. Gr. P. Angas published in the Proceedings of the 

 Zoological Society for 1865 a list of all the known species of 

 marine moilusca known to inhabit South Australian waters ; 

 previously to the publication of which many new species were 

 scientifically diagnosed by MM. Crosse and Fisher, himself, 

 and others. This list contains the names of ninety-six species 

 of Lamellibranchs and one Palliobranch. 



Mr. W. T. Bednall, in a List of Species of our Marine 

 Moilusca privately printed, added a few bivalves not previously 

 recorded. 



Through material communicated by me, Mr. G-. F. Angas 

 published in 1878 a first Supplement, and in the following 

 year a second Supplement to the List of our Marine Moilusca. 

 From these sources the total number of Lamellibranchs was 

 brought up to 116, and the Palliobranchs to 2. Of the 116 

 names of bivalves 13 are considered synonymic, thereby reducing 

 the number of species to 103 ; by recent accessions chiefly and 

 by the recognition of a few Lamarckian species as endemic in 

 the province, the total number of known species of Lamelli- 

 branchiata is 166, including 9 freshwater species, and of 



