34 



LAMELLTBRANCniATA. 



FaMTLT— ANOMIIDiE. 



PLACUNAHOMIA. 



128. P., sp. ind. Oval, transverse ; upper valve tliin, inflated, 

 waved, smooth, and concentrically striated muscular impressions(?). 



Localities. — Napier ; Huruuui Mound ; Broken Eiver (tj) ; Cave 

 Creek, Mount Somers. 



129. P. incisura, sp. nov. Sub-orbicular, compressed, waved, 

 witb concentric imbricatinsj scaly lamina) ; byssal notch very small, 

 anterior; muscular impressions(?). 



Localities. — Pareora Beds, E-angitata. 



Family — Ostreid^. 

 OSTREA. 



130. O. purpurea, HanUy ; Cat. Marine Moll., p. 84. 

 Localities. — Wanganui (tj) ; Shakespeare Cliff ; Manawatu Gorge, 



upper end. 



131. O. Virginica, Lamark; Cat. Marine Moll., p. 84. 

 Jjocalities. — Wanganui (u) ; Shakespeare Cliff. 



132. O. lutaria, Sutton, Cat. Marine Moll., p. 84. 

 Localities. — Wanganui (u) . 



133. O. nelSOniana, Zittel, Voy. Nomra, Pales., p. 55, pi. xi., 

 f. 7 (left valve). Shell irregular, elongato-ovate, thick, solid; valves 

 sub-equal, the right more convex, gibbous, strongly concentrically 

 laminated ; anterior apex contorted ; left valve flat, sometimes greatly 

 thickened, concentrically rugosely foliated ; umbones oblique, hinge 

 broad ; cartilage pit triangular ; muscular impression large, lunate, 

 posterior, hollowed. Height, 4'5 ; length, 3"0. 



Localities. — Napier ; Awatere ; Motanau (l) ; Manawatu Grorge, 

 upper end ; Tata Islan^. 



134. O. WUllerstoriii, Zittel, Voy. Nomra, Pales., p. M, pi. xi., 

 f. 6. Orbicular, flat, large, very thick ; exterior rugosely plicated ; 

 plicae distant ; gibbous ; area small, acute, triangular, scarcely exceed- 

 ing the margin, transversely striated ; ligament pit short, hollowed, 

 equally striated ; muscular impression large, impressed, placed high 

 up. Height, 5'6 ; length, 5'6. 



Localities. — Coast north of Haglan ; Cape Eodney ; Kawau ; Kai- 

 puki Cliffs ; Napier ; Oamaru. 



135. O. ingens, Zittel, Voy. Novara, Palce., p. 54, pi. xiii.,/! 3. 

 Elongated, very large and thick, convex, beak , produced ; exterior 

 gibbous, irregularly foliated ; area bounded on both sides by a sulcus, 

 transversely striated, greatly produced ; pit triaiUgular, hollowed ; 

 muscular impression large, posterior. Height, 8"8 ; length, 4 '4. 



Localities. — Waitotara ; Napier ; Castle Point ; Parakino. 



136. O. SUbdentata, sp. nov. Small, ovate, compressed ; left 

 valve larger and more convex, right flat ; both concentrically striated ; 



