FBESHWATEE SHELLS OF AUSTEALIA. 299 



118. Ne RITINA AURTCULATA, iamarc^. 



The species is quoted by Keeve as Australian, but without any 

 authority ; aud it is probably not an inhabitant of the con- 

 tinent. 



119. NEEiTrN"A PnicHABui, Dohrn. 



Neritina Prichardi, Dohrn, Proc. Zool. Soc. 1861, p. 206, pi. xxvi. 

 fig. 2; Martens, Con. Cab. p. 159, pi. xvi. figs. 24-26. 



ITah. North Australia (J/«s. Cioming); Piji Islands {Dohrn). 



There are three specimens of this species in the Cumingian 

 collection marked North Australia. They are much eroded on 

 the spire, aud present only a slight indication of the raised ridge 

 from which the tubulous spines arise in the normal form, and only 

 one of them exhibits a single short spine. Inobher respects they 

 are identical. 



120. Nekitika Leachii, Becluz . 



Neritina Leachii, Recluz, Rev. Zool. 1841, p. 312 ; Proc. Zool. Soc. 1843, 



p. 199. 

 Sah. New Holland. 



Genus Naticella. 



121. Naticella entkecastauxi, Becluz. 



Navicella entrecastauxi, Recluz, Revue Zoologique,\9>i\,'p.SSQ ; Reeve, 



Con. Icon. fig. 32 a-b. 

 Sab. Point Entrecastaux, King George's harbour, S.W. Aus- 

 tralia. 



Genus Coebicula. 



The species o£ this genus are excessively difficult of determina- 

 tion ; and without accurate knowledge of exact localities and a 

 good series of specimens, it is very troublesome to define with any 

 degree of precision Avhat may be the essential characters of the 

 different forms. Of the nine species enumerated, two (C. delilis 

 of Gould and C. baronialis of Prime) are known to me only by 

 description or a figure. 



122. Coebicula ovalina, DesJiat/es. (Plate VII. figs. 24-25.) 

 Corbicula ovalina, Deshayes, Proc. Zool. Soc. 1854, p. 343 ; Cat. Conch. 



Brit. Mus. p. 229; Prime, Cat. Corb., Amer. J. Conch, vol. v. p. 134 ; 



Clessin, Conch. Cab. p. 203. 

 Cyriua ovalina, Desh., Sowerby, Con. Icon. fig. "iT. 

 Hah. Port Essington. 



