90 THE AMERICAN MONTHLY [March 



Francisoo, from Cape Flattery to Atcha (Aleutian Islands), 

 from San Francisco to San Diego, Cal., from San Diego, 

 Cal,, to Honolulu, H. I. to Port Lloyd, Bonin Islands, 

 from Bonin Islands to Yokohama, Japan, and from Yok- 

 ohama, Japan to the Island of Tanaga (Aleutian Group). 



One of the soundings of which unfortunately the label 

 was destroyed, but which from other evidence seems to 

 be from somewhere near the Sandwich Islands is of con- 

 siderable interest, for it appears to be correlative, if it is 

 not of the same date, with what was taken by H. M. S. 

 "Challenger" in the South Pacific. But the Tuscarora 

 sounding is from the North Pacific. It also is the same 

 as was secured by Sir J. D. Hooker in the Antarctic 

 region and is described in the transactions of the British 

 Association for the Advancement of Science. Oxford 

 meeting, 1847. 



The forms of BacillariacesB (DiatomacesB) were in the 

 Tuscarora specimens as follows: 



Actinocjclus ehreiibergii, J. K. 

 Actinoptychus nndnlatus, C. G. E. 

 Arachnoidiscus ehrenber{j;ii, .T. W. B. 

 Asteromphalus 

 Biddnlphia aurita, L. 

 Chsetoceias gastridiuni, C. G. E. 



monicae, A. G. 

 Cosciuodiscus excentricus, C. G. E. 



patera, C. 



radiatus, C. G. E. 



iimbonatus, C. 

 Cydotella astraia, F. T. K. 

 Denticula elegana, F. T. K. 



palea, N. 

 Fragilaria pacidca, A. G. 

 Graraiiiatophora tropica, F. T. K. 

 Isthraia 



I'odosira horiiioides, M. 

 Khizosolenia 

 Synedra jeftVeysii, G. D. 

 Thalasicolia traunfeldii, (G.) C. 



A specimen I have from H. M. S. Challenger sound- 



