26 



LAMELLIBRA-T^CHIATA, 



MODIOLA. 



70. M. albicOSta, Lamarh; Cat. Marine Moll., p. 78. 

 Localities. — Motanau (u) ; Wanganui (u) ; Shakespeare Cliff ; 



Lower Grorge of the Waipara ; Broken River (u) ; Mount Caverhill ; 

 "Waikari. 



71. M., sp. ifid. Elongato-oblong, rounded in front, angled and 

 truncated behind ; with irregular concentric lines. Height, l"! ; length, 

 2-25. 



Localities. — Lower Gorge of the Waipara. A very imperfect 

 specimen. 



LITHODOMUS. 



72. L. StriatUS, sp. nov. Elongato-oblong, umbones anterior, 

 inflated in front and compressed behind, posterior end very finely 

 radiately striated. Height, '8 ; length, 2"6. 



Localities. — Shakespeare Cliff. 



Eamilt AVICULID^. 



PERNA. 



Compressed, sub-quadrate ; cartilage pits numerous, elongated, 

 close set. 



73. P., s/>. ind. 



Localities. — Castle Point. Eragraent of a hinge of a large species ; 

 hinge 1'2 in breadth. 



PINNA. 



74. P. lata, '5/?. Broadly triangular, witli concentric strisB ; 

 anterior end rather excavated. Height, 8 ; length, 7'25 ; angle of 

 apex, 60°. 



Localities. — Cobden. 



75. P. zealandica, Gray; Cat. Marine Moll., p. 79. 

 Localities. — Wanganui (u) ; Shakespeare Cliff; Awatere. 



76. P. plicata, sp. nov. Large, with rather distant radiating 

 plications, the ridges and furrows being of about equal breadth. 



Localities. — Culverden(?), in blue clay. A fragment only. 



77. P. distanS, sp. nov. Large, with distant plications, the ridges 

 being much narrower than the furrows. Height, 9 ; length, 4'5 ; 

 angle of apex, 40°. 



Localities. — Caversham. 



Eamilt — Teigoi^iad^. 



Shell equivalve, close, trigonal, umbones directed posteriorly ; 

 ligament external ; interior nacreous ; hinge teeth few, diverging ; 

 pallial line simple. 



TRIGONIA. 



Shell equivalve, inequilateral, sub-trigonal ; hinge composed of two 

 oblong, divaricate, lamelliform teeth in the right valve, transversely 



