LAMELLIBRANCHIATA, 



21 



CHIONE. 



34. C. Vellicata, .7?. nov. Ovate, rounded at both ends, posterior 

 dorsal margin slightly arched ; anterior dorsal margin concave ; dis- 

 tantly, generally irregularly, concentrically ribbed and finely radiately 

 striated ; lunule lanceolate, impressed, radiately striated and slightly 

 margined. Height, 125 ; length, 1"4. 



Localities. — Awamoa ; Castle Point ; Awatere ; Mount Caverhill ; 

 Lyndon ; Mount Cookson ; Motanau (l) ; Waikari ; White Cliffs, 

 Taranaki ; Chatham Islands ; Pomahaka, Otago ; Kaiwara Stream, 

 Hurunui. 



35. C. accuminata, sp. nov. Ovate, rounded in front, attenu- 

 ated and slightly truncated behind, posterior dorsal margin nearly 

 straight, anterior dorsal margin concave ; finely and closely concen- 

 trically striated, lunule cordate, impressed under the umbone, slightly 

 margined. Height, -75 ; length, "93. 



Localities. — Pomahaka, Otago. 



36. O. StUChburyi, Gray ; Gat. Marine Moll, p. 70. 

 Localities. — Wanganui (u) ; Cape Kidnappers ; Hautapu Falls ; 



Hampden; Waitotara; Parakino ; Paparoa(?). 



37. C. meSOdesma, Quoy ; Gat. Marine Moll., p. 70. 

 Localities. — Wanganui (u) ; Shakespeare Cliflf ; Patea ; Hautapu 



FallsC?). 



38. C. gibbosa, Hutton, Gat. Marine Moll., p. 71. 

 Localities. — Wanganui (u) . 



39. C. assimHiS, sp. nov. Ovate, posterior end slightly tapering, 

 its dorsal margin arched ; anterior end rounded, its dorsal margin con- 

 cave ; concentrically striated, the striae higher and broader at the 

 anterior end. Height, '9 ; length, 1*2. 



Localities. — Shakespeare Cliff. 



40. C. yatei, Gray; Gat. Marine Moll., p. Q9. 

 Localities. — Wanganui (u). 



CYTHEREA. 



41. C. enysi, sp. nov. Large, solid, orbicular-trigonal ; posterior 

 end truncated, its dorsal margin slightly arched ; anterior end rounded, 

 its dorsal margin concave ; irregularly concentrically striated ; umbones 

 smooth, inflated ; margin smooth. Height, 4-2 ; length, 4'5. 



Localities. — Lower Waipara Gorge; Broken Eiver (r). 



CALLISTA. 



42. C. disrupta, Beshayes; Gat. Marine Moll, p. 71. 

 Localities. — Wanganui (u) ; Hampden. 



43. C. elegans, sp. nov. Oblong, rather compressed ; anterior 

 end short, rounded ; posterior end broad, rounded, its dorsal margin 

 arched ; with distant concentric narrow ribs, crossed by fine radiating 



