50. Tellium decussate, Lamarck, An. s. Vert., v., p. 532 ; 

 Homer, Mem. Tellina, t. 23, £. 1—3, 1873. 



Occurs on the whole length of our coast, but is not a common 

 shell. It ranges from King George Sound (Lamarck) to New- 

 South "Wales. 



Orbicular with decussate ornament, about two inches 

 diameter. 



51. Macoma Marije, T. Woods, in Proc. Eoy. Soc. Tasmania 

 for 1875, p. 162, as a Tellina ; Macoma rudis, Bertin, Archives 

 Mus. Hist. Nat., 1878, t. 9, f . 2, p. 335. 



St Vincent Gulf, Fowler's Bay, Streaky Bay, Encounter 

 Bay, Lacapede Bay ; only at the last locality is it at all common. 



Bertin's type is from Port Philip. I have collected the 

 species at Corio Bay. Tasmanian examples of M. Maries per- 

 fectly agree with description and figures of M. rudis. Tenison 

 Woods implies in his description of the species a reference to 

 the genus Macoma, and the diagnosis is amply sufficient for 

 identification. 



Transversely elliptical, white, gaping, and roundly truncated 

 posteriorly ; length up to one and a quarter inches. 



52. Metis umbonella, Lamarck (Tellina); An. s. Vert., v., 

 p. 532 ; id. Hanley Mon. Tellina, t. 56, f . 13 ; Eeeve, Mon., 

 t. 38, f. 214. 



Port Lincoln (Cuming coll.); King Island (Lamarck). 



The Australian localities have been usually considered to be 

 erroneous. The species is not known here, and Tenison Woods 

 does not mention it in his census of Tasmanian Marine Shells. 

 Bertin says, however, it inhabits New Holland, and is repre- 

 sented in the Paris Museum by an original specimen from 

 King Island (type of Lamarck). So far as known, it would 

 appear to be peculiar to Southern Australia. 



Family Petricolldj:. 



53. Naranio divaeicata, Chemnitz, sp. JBetricola lucinalis, 

 Lamarck, loc. cit., p. 504. 



Holdfast and Aldinga Bays, Port Lincoln. Also at King 

 George Sound (Lamarck), Port Darwin!, and Indian Ocean. 

 Thm, ventricose, divaricately sculptured. 



54. Venerupis exotica, Lamarck, An. s. Vert., v., p. 507 ; 

 Eeeve, Mon., t. 2, f. II ; V. distans, Lamarck, op. cit., p. 507. 



Streaky Bay (E. T.); Corney Point, Yorke Peninsula 

 (lie Doug all); St. Francis Isles (Lamarck). 



V. distans was described from specimens collected by Peron at 

 St. Peter and St. Francis Isles ; the species has not been 

 recognised, but from the diagnosis it should be absorbed in 



