BY H. I. JENSEN. 671 



Plate lxiv. — Microsections of (a) new lava, (b) old lava, from Savaii. 



Fig. 1. --Basalt from new lava stream (S. 1) taken at Malaiola, between 



Matauto and Satapatu. Nicolls uncrossed. The porphyritic 



crystals giving rectilinear and rounded sections are olivines. 



The augite is interstitial. The felspar occurs as lath-shaped 



microlites. Note the steam vesicles. 

 Fig. 2. — Same as Fig. 1. Nicolls crossed. 

 Fig. 3. -Basalt Scoria from the Mauga Mu (S. 2). Nicolls uncrossed. The 



phenocryst fragment is augite. 

 Fig. 4. — Basalt from an old lava stream (S.5) : Vaipuli, near Matauto; the 



phenocrysts are corroded olivines. Nicolls crossed. 

 Fig. 5. — Basalt from an old lava stream (S.4) ; Patamea, near Satapatu. 



Nicolls uncrossed. The rectilinear phenocrysts are olivines with 



rounded glass inclusions. 

 Fig. 6. — Same as Fig. 5. Nicolls crossed. 



Postscript [added 28th November, 1906]. — Since the foregoing- 

 paper was written, further developments have taken place in 

 connection with the volcanic eruption of Savaii. A report in the 

 Sydney "Daily Telegraph," of November 3rd, 1906, dated Apia, 

 October 10, states that the volcano continues active; and that 

 immense quantities of lava still flow seaward, and enter the 

 Pacific, forming quite an extension of the island. " The old lava 

 channels," the report says, " were choked up, and the rising lava 

 almost overflowed the crater's mouth. But before getting quite 

 to the top, an exit was found, and the accumulated mass rushed 

 down the mountain side, overwhelming the village of Satapatu." 



In a private letter to me dated 21-ix.-06, Mr. Williams, the 

 Amtmann of Savaii, writes — " On September 4th the flow of lava 

 started to run in Satapatu, and filled up the passage in the sea, 

 and ran along past the priest's house on the beach side. On the 

 6 th it stopped running, and only at one small place on the coast 

 was there any lava flow. I consider the lava flow of 4-ix.-06 as 

 one of the most fierce we have had. It ran into the sea at 

 Satapatu, and tilled up the bay, which was 30 fathoms deep. 

 Now, since that time it started again, on Thursday, the 13th, 

 inland, and burnt all the town (Satapatu), taking everything 

 before it. The large Catholic Church is half-full of lava, and 



