406 Transactions. — Geology. 



29. Mytihis striatus, Hutton. 



30. (.'renella elongata, Hutton. 

 81. Lima jejfn'ijsiana, Tate. 



32. Pec ten hutchinsoni, Hutton. 



33. Pecten athleta, Zittel. 



34. Pecten yaJdensis, Ten. -Woods. 



35. Pecten chathamensis, Hutton. 



36. Pecten jmlymorphoides, Zittel. 



37. Terebratula bulbosa, Tate. 



38. Waldheimia (jravida, Suess. 



39. Waldheimia taylori, Etheridge. 



40. Waldheimia jMtagonica, Sowb. 



41. Waldheimia radiata, Hutton.* 



42. Terebratella sinuata, Hutton. 



43. Terebratella aldinyce, Tate. 



44. Terebratellina suessi, Hutton. 



45. Pihynchonella nigricans, Sowb. 



46. Bhynchonella squamosa, Hutton. 



47. Leiocidaris australice, Duncan. 



48. Echinus ivoodsii, Laube. 



49. Pericosmus compressus, McCoy. 



50. Brissus eaimius, Zittel. 



51. Flabellum laticostatum, Ten. -Woods. 



52. Flabellum spenodeum, Ten. -Woods. 



Of the 40 species of Mollusca here enumerated, ten have not 

 been found elsewhere, nine have been found elsewhere only in 

 the Pareora System, and six elsewhere only in the Oamaru 

 System. But as the known Pareora species are more than two 

 and a half tmies as numerous as the known Oamaru species, 

 this leaves a balance in favour of the beds belonging to the 

 Oamaru System. The four Echinoidea belong only to the 

 Oamaru System. Flabellum laticostatum is not recorded from 

 elsewhere, but F. splicnodeum occurs also at Mount Caverhill, in 

 the Amuri District. Five or six species of the Mollusca are 

 still living, that is about 10 per cent. 1 therefore agree with 

 the Survey that these beds are the equivalents of the Curiosity 

 Shop beds, which 1 have elsewhere shown to be the equivalents 

 of the Weka Pass and Ototara limestones.! 



Ilelation to the Waipara System. — At the first limestone 

 gorge of the Porter liiver, the Oamaru System is seen resting on 

 the Waipara System quite unconlormably, as has already been 



* Waldheiviia radiata, sp. nov. Shell broadly ovate, ■with a deep ventral 

 ridge and dorpal furrow, but very iiicgular. yurfnce with strong longi- 

 tudinal ribs— about 18 on the ventral valve, of which 4 or 5 are on the 

 ridge — imbricated with coarse growth-lines. iJtak prominent, acute, the 

 foramen tub-triangular, the deltidial plates disunited. Length, 0-56; 

 breadth, (i-5; thicknet's, OH to 0-4 inch. A well-marked punctate shell. 



t " Quar. Jour. Geol. Soc. of London," vol. xli., p. 547. 



