2(S4 DIATOMACE.^^, — ASTEOMPHALUS 



ASTEROMPHALUS HOOKERI Ehb. 



(.1. <nhniiicii.< Ci.. Kongl. Sv. Vet. Akad. Handl. Vdl. XXXIV n. 1 ])ag. ID 



PI. VIII fig. 7—9.) 



1898 F,'1,niarij: 00^—61-^ N. 3°— 5° W. 



Jtmc: 65^ N. 31" W. 

 ^ Julji: 78" N. 3" W. (deep .sea haul). 



Temperatupe : o.o, mean of 8 obs., max. 7..-,, min. 3.o. 



Salinity: 34. i-., mean of 7 obs., max. 35. o:?, min. 33.1?. 



Plankton-type. Noted from the northern Atlantic, nsually 

 in T/'ic/io- or rAr/Yo-pIankton. It was not very rare in 1896 west 

 of Spitzbergen, but extremely rare in 1898 and 1899. — T. 



Remark. This species occurs abundantly in the southern At- 

 lantic and southern Indian Ocean. It is perhaps a variety of .1. 

 lirookel (Grev. T. Mic. Soc. Vol. VIII 1860 PI. IV fig. 18), which 

 has been found in soundings from Kamtschatka. 



ASTEROMPHALUS HEPTACTIS Kalfs.^ 



(A. Schm. Atl. iM. XXXVlll fig. 5-8.) 



1898 March: area between 44° N. 17^ \\\, 49^ N. 18" W., 5;")° N. 



12" W. and 45" N. 13 W.; 63° N. 2° E. 

 April: area between 39° N. 24° W., 50° N. 9° W. and 49° 



N. 23° W.; 62° N. 2° E. 

 May: 50° N. 22° W. 

 Jiihi: 40° N. 58° and 67° W. 

 Aurjust: 60° N. 3° W. 

 September: 59° N. 2° W. 

 Oetober: 59° N. 1° W. 

 November: area between 56° N. 36° W., 55° N. 21° W. and 



56° N. 23° W.; 9° S. 34° W. 

 Derrmber: 26° S. 45° W. 



1899 April: 46° N. 13° W. 

 Xnrember: 51° xN. 13° W. 



Temperatupe: 13. g, mean of 21 obs., max. 28, min. 7.s. 

 Salinity: 35.3.-i, mean of 19 obs , max. 37. 4i, min. 33.8s. 

 Plankton-type: S. 



^ Osteiifeld"s ilata not used. 



