90 THE AMERICAN MONTHLY [M-.uih 



Fraiu;isco, from (^ajte Fl.'vtteiv to A tclia ( Ah'utiMii Islands)' 

 from San Francisco to San Dieo^o, Cal., from San Diego, 

 (.'al,,to Honolulu, H. I. to Port Lloyd, Bonin Islands, 

 from Bouin Islands to Vokohama. Ja])an, and from Yok- 

 ohama, Japan to the Islanil of Tanag'a (Aleutian (nou})). 



()ne of the soundings of which uufortunately tho lahel 

 was destroyed, but which from othei evidence seems to 

 V»e from somewhere near the Sandwicli Islands is of con- 

 siderahle interest, for it appears to be correlati\e. if it is 

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

 "Challenger" in the South Pacific. Hut the Tuscarora 

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

 as was secured by Sir J. D. Hooker in th(> Antarctic 

 region and is described in the transactions of the British 

 Association for the Advancement of Science. Oxford 

 meeting, 1847. 



The forms of Bacillariacea^ (Diatomacea^") were in the 

 Tuscarora specimens as follows: 



Actinocyclus ehienbergii. .1 . K. 

 Actinoptychiis iindulatus, C. G. E. 

 Aruflinoidisciis elireiiherjiii, J. W. B. 

 Asteroiuphaliis 

 Hiddulphia aurita, L. 

 ClKftoceias g;i.stridinm, C. (J. K 



inouic.i', A. 0. 

 Citsiiuodiscus excentricjis. C (i. K. 



patera, C. 



radiatus, C. (J. H. 



iiinbonatus, C. 

 Cvclolella astra-a, V. T. K. 

 Deiititiila eh^jjans. 1'. T. K. 



palea, N. 

 I'ratiilaria ijatiiica. A. (i. 

 ( WaiiiiKatoiiliora tropica. I'. T. K. 

 Isthuiia 



I'lMlosira lionuoidfs. M. 

 liliizosdleiiia 



Syiiedra jftVreysii, (i. D. 

 Tbala.'Jifolia Iraiinrelilii. ((J.I C 



A specimen 1 ha\e fi-oin 11. M. S. ('hallenger sound- 



