Hogben. — On the East Coast Earthquake. 421 



-26. 1899. Hutton, Trans. N.Z. Inst,, xxxii., p. 171. 



27. 1901. Mulgan, Trans. N.Z. Inst., xxxiv., p. 414. 



28. 1901. Fox, Trans. N.Z. Inst., xxxiv., p. 452. 



EXPLANATION OF PLATE XXXII. 



Figs. 1 and 2. Flabcllum papakurense, sp. nov. : a, side view ; b, view of 



base : both natural size, lc, calice from above ; 2c, part of 



calice : both x 2. 

 Fig. 3. Leda fastidiosa (specimen b) : a, natural size ; b, magnified 



(drawn with camera lucida). 

 Fig. 4. Amussium papakurense, sp. nov. : Chiefly a cast, the internal 



ribs being preserved ; part of the shell showing the external 



ribbing is adherent (natural size). 

 Fig. 5. Vaginella aucklandica, sp. nov. : a, natural size ; b and c, views 



from opposite sides : both x 2. 



Art. XLV. — Notes on the East Coast Earthquake of 9th 



August, 1904. 



By George Hogben, M.A. 



[Bead before the Wellington Philosophical Society, November, 1904.} 



This earthquake was felt nearly all over the colony, from 

 Auckland to Queenstown. Its effects were most marked in 

 the Hawke's Bay and Wellington Districts, especially on and 

 near the coast from Porangahau to Castlepoint, where rock- 

 falls occurred from cliffs, and fissures were formed in the 

 surface-crust, indicating an intensity of IX. (or nearly so) 

 on the Bossi-Forel scale. In the area affected and in its 

 intensity it closely resembled the earthquake of the 17th 

 February, 1863, which proceeded from the same region of 

 disturbance. 



Memoranda or notices of the shock were received from 

 the following places, the Roman numbers denoting the degree 

 of intensity (in some cases only approximately) : — 



IX. : Castlepoint, Motuotaraia, Porangahau. 



VIII.-IX. : Napier, Hastings, Te Aute, Kopua, Danne- 

 virke, Pahiatua, Wellington. 



VIII. : Woodville, Masterton, Featherston, Carterton. 



VII. -VIII. : Wairoa, Palmerston North. 



VII. : Gisborue, Feilding. 



VI. : Opunake, Aramoho, Marton, Nelson, Blenheim, 

 Taupo. 



V.-VI. : New Plymouth, Hawera, Kaikoura, Motueka 

 Collingwood, Wakapuaka. 



