90 THE NAUTILUS. 



The writer has specimens from five different localities. Four 

 of these localities are on ridges and the other in a valley. First 

 locality, Manoa-Palolo Ridge: Fossil specimens in collection as 

 catalogued, Cat. No. 487, four sinistral and No. 492 three sin- 

 istral, making a total of seven sinistral specimens. 



Second locality, Palolo-Waialae Nui ridge: Fossil and living 

 specimens, Catalogue No. 61 nine dextral, No. 382 two dextral 

 and two dextral fossil specimens not catalogued. Total, eleven 

 dextral live specimens and two dextral fossil specimens. 



Third locality, Waialae-Nui valley: Catalogue No. 38 seven 

 dextral specimens, No. 383 one dextral specimen, No. 39 seven 

 dextral specimens. Total, fifteen dextral specimens. 



Fourth locality, Waialae Iki-Wailupe .ridge: Catalogue No. 

 28, fifty-two sinistral specimens. 



Fifth locality, Wailupe-Niu ridge: Catalogue No. 14, two 

 hundred and twenty-two sinistral specimens. 



Summary, 



Fossil. Live. 



Dextral. Sinistral. Dextral. Sinistral. 



1st locality . . 7 



2nd . . 2 11 



3rd . . 15 



4th " . . 52 



5th " 222 



Totals. . . 2 7 78 222 



Thus it can be seen from the above given data the specimens 

 increase in number from west to east, the first ridge having no 

 live specimens and the last having the most. What does this 

 signify ? Does not this signify that since Diamond Head and 

 Punchbowl came into eruption, climatic conditions have 

 changed which resulted in the elimination of cestus from the 

 neighborhood of the two now extinct volcanoes ? 



Now, in relation to the fossils found on location one, this is 

 the nearest locality to Diamond Head; the second locality a 

 little further away; the third still further; and the fourth and 



