164 



Tellina Gainozoica, T. Woods, Plate xviii., fig. 5. 



Reference. — Proc. Boy. Soc. Tasmania for 1876, p. 113. 



Ovate-oblong, equivalve, inequilateral, very compressed and 

 thin ; anterior end rounded, posterior end sub-rostrated, not 

 inflected ; posterior carina inconspicuous and very close to the- 

 margin ; umbos small, obtuse, antemedian. Surface ornamented 

 with very fine and close growth-lines, and equidistant thin, 

 erect, inconspicuous lamella?. Interior unknown. 



Dimensions. — Antero-posterior diameter, 24 ; umbo-ventral 

 diameter, 15 ; intersection of the diameters at 11'5 from the 

 anterior end ; sectional diameter, 5. 



Locality. — Table Cape, Tasmania (B. M. Johnston!) 



This species, uniquely represented, so closely resembles 

 T. alba, Quoy and G aimarcl, of the same size, actual specimens of 

 which from the AYanganui series in New Zealand have been 

 under observation, as to suggest the probability of its being 

 merely an individual variation of that species. However 

 trivial the distinctive characters are, yet should they hereafter 

 be found constant, the claim to specific rank will be fairly well 

 established. 



It differs from T. alba in its more central umbo, not so- 

 acutely angular posteriorly, and by the presence of raised 

 growth-lines. 



Tellina lata, Quoy and Gaimard. 



Reference.— Voy. de T Astrolabe, t. 81, figs. 8-10, vol. 3, p. 497 

 (1835). 



Locality. — Oyster-banks or the superior fossiliferous beds in 

 the cliffs of Aldinga Bay. 



Dimensions of the largest example. — Antero-posterior, 125 ; 

 umbo-ventral, 75 ; sectional diameter, 28. 



I have little hesitancy in referring the fossils to the living, 

 species inhabiting North Australia and the Indo-Pacific regions, 

 despite the fact they are somewhat imperfectly preserved, and 

 have not been compared with actual specimens. 



Tellina albinelloides, spec. nov. Plate xvi., figs. 4a— 45. 



Oval, subequilateral, very compressed, thin, pellucid, anterior 

 side rounded, posterior side produced, subangulated, and 

 slightly folded. Umbones inconspicuous, acute, directed back- 

 ward, and situated a very little in front of the centre. The 

 exterior is ornamented with fine, regular, concentric striae, 

 which are raised into thin, narrow, imbricating lamella? on the 

 angulated posterior slope. 



Dimensions. — Antero-posterior diameter, 44 ; umbo-ventral 

 diameter, 22 ; sectional diameter through closed valves, 5 5 

 millimetres. 



Locality. — Common in the upper beds at Muddy Creek. 



