OLlVEJl : iSTEW 2iEALAND PELECYPODS. 183 



Sowerby. Througli the courtesy of Mr. Murdoch I have been able 

 to examine this specimen, and it is referable to the present species. 

 The use of the name reniformis shows how persistently names 

 once introduced into the fauna are retained. Hutton used it for 

 the Dunedin rock oyster ( = 0. angasi), but Sowerby's description does 

 not agree with any New Zealand species. The locality from which 

 it was collected is unknown, and the name is best rejected as 

 indeterminable. 



8. Arca trapezia, Deshayes. 



Area trapezia, Deshayes, 1840, Mag. Zool., p. 21. 



This species has not hitherto been recorded from New Zealand, 

 but in 1916 I found two waterworn valves at Spirits Bay, and a few 

 years later Mr. A. W. B. Powell discovered a valve in a much better 

 state of preservation at Muruwai, west of Auckland. All these 

 specimens are large, heavy shells, but I am unable to separate them, 

 as a species, from Australian specimens of A. trapezia. 



9. Cardium maculosum. Wood. 



Cardium maculosurti, Wood, 1818, General Conchology, p. 218, 



pi. lii, fig. 3. 

 Protoeardia pulchella (not Gray), Oliver, 1915, Trans. N.Z. Inst., 



vol. xlvii, p. 556. 

 I am indebted to Mr. Hedley for naming shells of this species 

 and supplying the reference above quoted. It is found at the 

 Kermadec Islands, whence I recorded it as Protoeardia pulchella, 

 which species, however, has not yet been obtained there. 



10. Las^a minutissima (Iredale). 



Iredale (Trans. N.Z. Inst., vol. xl, 1908, p. 387) described this 

 species as a Modiolarca. Suter (Man. N.Z. Moll., p. 926, 1913) 

 reduced it to Lascea miliaris. Iredale next asserts that his species 

 is a " Modiolarca " and a valid species, and (Trans. N.Z. Inst., 

 vol. xlvii, 1915, p. 487) lists it as Gaimardia minutissima. If, before 

 making this statement, Iredale had examined specimens, he could 

 not have repeated his error. The species is correctly placed by 

 Suter under Lascea, but it is certainly not L. miliaris. It is a good 

 species, and should be entered as above. 



11. Pseudarcopagia DiscuLus, Deshayes. 



With Iredale's statement that Arcopagia needs generic distinction 

 I agree, but he incautiously accepts Suter's location of Tellina 

 disculus, instead of examining the species for himself. It may be 

 referred to Pseudarcopagia, which is a closer ally of Tellina than is 

 Arcopagia. 



