Tellina. PELECYPODA. 949 



Iii Auckland and Wellington Harbours T. deltoidalis attains a much 

 larger size than in Australia or Tasmania, as is evidenced by the 

 measurements given. I have compared New Zealand and Australian 

 specimens of the same size, and could not find the slightest difference 

 between the two. 



Maori. Kaikaikaroro (teste Captain Bollons). 



3. Tellina eugonia, nom. nov. Plate 59. fig. 12. 



Tdlina angulatu. Mutton, T.X.Z.I., xvii, 1884 (1885), 322; Plioc. M., 80, 

 pi. 9, f. 86 ; Suter, T.N.Z.I., xxxviii, 318 ; not of Gmelin. 



Shell ovato-trigonal, transverse, compressed, inequilateral, anterior 

 i- nd longer, regularly concentrically ribbed. Beaks not much raised, 

 contiguous, sharply pointed, incurved. Anterior end somewhat longer, 

 regularly rounded, the dorsal margin lightly convex and very slowly 

 descending. Posterior end attenuate, shortly truncated, the dorsal 

 margin straight or lightly excavated, basal margin broadly rounded, 

 ascending posteriorly. Sculpture consisting of equidistant, close, 

 obliquely raised, sharp concentric ribs, the interstices with tine micro- 

 scopic radiate strife; right valve with a posterior fold, left valve 

 with 2 posterior folds, separated by a broad groove ; at these folds 

 rh.e ribs are partly getting obsolete and the remaining ones are 

 somewhat lamellate. Colour yellowish-horn. Interior white, shining, 

 radially faintly striated, and showing to some extent the sculpture 

 of the outside. Hinge : Right valve with two cardinals, the posterior 

 bifid, and 2 laterals, the anterior nearer the cardinal than the posterior ; 

 left valve with 2 cardinals, the anterior bifid, the posterior very small, 

 and 2 laterals. Ligament rather short. Adductor-scars unequal, the/ 

 anterior high, the posterior smaller, rounded. Pallial sinus large, 

 extending to within close proximity of the anterior scar. 



Length, 33 mm. ; height, 22 mm. ; diameter, 9 mm. (type). 



Type, from the Pliocene, in the Canterbury Museum, Christchurch. 



Hob. Channel Island, Hauraki Gulf, in 25 fathoms ; Titahi Bay. 

 Cook Strait (Miss Mestayer) ; off Otago Heads ; Stewart Island, in 

 15 fathoms (A. Hamilton). 



Fossil in the Pliocene. 



4. Tellina Huttoni, E. A. Smith, 1885. Plate 54, figs. 12, a, b. 



Tdlina (Tellindla) Huttoni, E. A. Smith, Chall. Rep., xiii, 1885, 101, pi. 4, 

 f. 2. 



Shell small, thin, compressed, translucent, very inequilateral, 

 oblong, rounded in front, wedge-shaped behind, shining, closely 

 concentrically striated, yellowish or pinkish. Beaks acute, white, 

 situated at the posterior third of length. Anterior end convex, the 

 dorsal margin long, but little descending, nearly straight. Posterior 

 end shorter, oblique, narrowly convex, the dorsal slope straight, basal 

 margin lightly rounded, convexly ascending in front, faintly sinuated 

 behind. Sculpture consisting of very fine concentric striae, the beaks 



