MOLLUSCA. — HEDLEY. M 3 



enumerated 802 marine mollusca in his list of Port Jack- 

 son invertebrata. No later list appeared. The present 

 catalogue increases this to a total of above twelve hun- 

 dred. The list has also been purified 'by formally dis- 

 charging a number of species erroneously attributed to 

 this fauna. Noteworthy among these is a block of At- 

 lantic species which, by a mistake of Sir John Murray, 

 was included in the Challenger series of 410 fathoms off 

 Sydney. It is a moderate estimate to suppose that future 

 research will recognise two thousand species of mollusca 

 from the waters of this State. The time is at hand when 

 local observers may ascend from enumeration and nomen- 

 clature to a study of habits and structure. 



I am much indebted to Mr. T. Iredale for advice on 

 nomenclature, and for notes on preoccupied names, such 

 as Bulla australis and Purpura negleeta. 



Sub-Kingdom MOLLUSCA. 



Class PELECYPODA. (1—319). 

 Order PRIONODESMACEA. (1 - 101) 



Family NUCULIDJE. 

 PRONUCULA Hedley, Mem. Austr. Mus., iv., 1902, p. 290. 

 1— decorosa Hedley, Mem. Austr. Mus., 1902, p. 290, 



f. 39. 

 2 — hedleyi Pritchard and Gratliff, Proc, Roy. Soc, 



Vict., xvii., 1904, p. 237; Nucula minuta Ten.- 



Woods, Proc. Roy. Soc. Tasm., 1876 (1877), p. 



156; Hedley, Mem. Austr. Mus., iv., 1902, p. 



291, f. 40. 

 NUCULA Lamarck, Mem. Soc. N.H., Paris, 1799, p. 87, 

 3 — consobrina Adams and Angas, Proc. Zool. Soc, 



1863, p. 427; Hedley, P.L.S.N.S.W., xxxviii, 



1913, pi. 16, f. 1-3. 

 4 — obliqua Lamarck, An. s. vert., vi. (i.), 1819, p. 



59 ; Chenu, Man. Conch., ii, 1862, p. 179, f . 897 ; 



Hedley, P.L.S.N.S.W., xxviii, 1913, p. 263, pi. 



16, f. 4-6; = N. simplex Adams, 1856, = anti- 



