950 PELECYPODA. [Eulamellibranchia. 



smooth ; at the posterior dorsal part the strife are sharply raised ; 

 a few faint radiate striae are visible on the posterior end, the left valve 

 having also an obsolete fold. Colour pinkish or yellowish. Interior 

 of the same colour, polished, with microscopic radial striae. Hinge : 

 2 cardinal teeth in each valve, the right posterior and left anterior 

 stout, triangular, and slightly cleft at the top ; lateral teeth more 

 distinct in the right valve, the anterior teeth near the cardinals, the 

 posteriors remote. Ligament short, stout. Adductor-scars unequal, 

 the anterior oval, high, the posterior irregularly rounded. Pallial 

 sinus deep, reaching nearly to the anterior muscular scar. 



Length, 10 mm. ; height, 5-3 mm. ;. diameter, 2 mm. 



Ti/pc in the British Museum. 



Hob. Queen Charlotte Sound, Cook Strait, in 10 fathoms ; 

 "Challenger" Station 16?A; Lyttelton Harbour, in 2-4 fathoms 

 (H. S.). 



Var. sterrha, n.v. 



Tellina ticaonica, Deshayes : Button, C.M.M., 67 ; M.N.Z.M., 144 ; not of 

 Deshayes. 



Distinguished from the species by the following characters : The 

 shell is larger, much more solid, the valves, especially the left, more 

 convex, opaque, the surface very distinctly iridescent, the posterior 

 end is flexed to the right ; the colour is more intense, mostly pink ; 

 interior porcellanous, pink or flesh-colour, whitish at the margin. 



Length. 14 mm. ; height, 10 mm. ; diameter, 4 mm. 



Type in my collection. 



Hob. Lyttelton Harbour, in 2-4 fathoms, type (H. S.) ; Wet 

 Jacket Arm, in 12 fathoms (Captain Bollons) ; Stewart Island, in 

 15 fathoms (A. Hamilton). 



5. Tellina urinatoria, n. sp. Plate 54, fig. 13. 



Shell small, thin, compressed, transversely oval, very inequilateral, 

 white, convex at both ends. Beaks at about the anterior third of 

 length, acute, slightly raised, and directed forwards. Anterior end 

 short, convex, the dorsal margin oblique, slightly rounded. Posterior 

 end produced, rounded, the dorsal margin straight, very slowly de- 

 scending ; basal margin broadly convex, slightly ascending anteriorly. 

 Sculpture consisting of very fine and close concentric lines, crossed by 

 microscopic radiate striae. Colour white. Interior polished, white, 

 smooth. Hinge : 2 cardinal teeth in each valve, the anterior left and 

 posterior right stouter, triangular, cleft at the top ; 2 laterals in each 

 valve, the anterior teeth nearer the cardinals. Adductor-scars unequal. 

 Pallial sinus large, reaching the anterior adductor-scar. 



Length, 7-5 mm. ; height, 5 mm. ; diameter, 2-3 mm. 



Type in the Canterbury Museum, Christchurch. 



Hob. Twenty-four miles south-east of Long Point, in 120 fathoms 

 ,(E. R. Waite). 



