26 P. T. CLEVE. PLANKTON COLLECTED BY THE SWEDISH EXPEDITION TO SPITZBERGEN. 



Acanthometron quadrifolium, as transitional forms exist. I therefore include this form in 

 A. quadrifolium. 



Surface : 



Date. 



Lat. N. 



Long. 



Temp. 



Sal. 



Fq. 



Pl. 



4 IX 



72° 43' 



18°43' E. 



8,8 



35,01 



7- 



Tp Ns 



5 IX 



71° 57' 



19° E. 



9,08 



34,96 



C 



Tp (jXs) 



5 IX 



11° 14' 



19° 38' E. 



9,40 



34,92 



C 



TpNs 



6 IX 



70° 23' 



20°32' E. 



9,37 



34,41 



+ 



Tp Ns 



Deep-sea hauls: 



Date. 



1 



Lat. N. 



Long. 



Depth. 



Fq. 



Pl. 



26-27 VII 

 ! 1 IX 



77° 39' 

 75° 50' 



1°18'E. 

 15°25'E. 



500-0 m. 

 325-0 ■> 



r 



1 



r.s i 



Acaiithonia Miilleri Hkl. 



Surface : 



Date. 



Lat. N. 



Long. 



Temp. 



Sal. 



Fq. 



PL 



2 IX 



5 IX 



75" 50' 

 71° 57' 



15° 32 E. 

 19° E. 



5,52 

 9,08 



35,01 

 34,96 



r 



+ 



S T 

 Tp {Ns) 



Habitat: Mediterranean (Hkl.). — Styliplanktoii of tlie warraer Atlantic (Cl.). 



Actinomma tooreale Cl. N. sp. 



a. Primordial shell. Thick walled, 0,06 mm. in diameter, with rounded, regular 

 pores (0,003 to 0,oo5 mm. in diameter), two to three tiraes broader than the bars, four 

 on the radius. Spines in variable number, with triangulär and forked apophyses half 

 way to the apex. — Pl. I, fig. 5 a. 



b. Secundary {Haliomrna-)shell. Thick walled, O, os mm. in diameter, with rounded 

 pores of unequal size (0,oi to 0, 02 mm. in diameter), three to four on the radius. Bars 

 0,002 to 0,003 mm. thick. Spines in variable number, stout shorter than the radius, 

 scattered at intervals. — Resembles Halioinma beroes. — Fig.: Pl. I, f. .5 b. 



c. Tertiary {Actinomma-)shell. Thin walled, 0,i to 0,12 mm. in diameter, with 

 numerous, small (0,oo2 to 0, 007 mm. in diameter), irregular rounded pores. Bars as broad 

 as the pores. Spines numerous, scattered, half aa long as the radius. — Fig.: Pl. I, 

 f. 5 c; d structure. 







Deep-sea 



hauls : 







Date. 



Lat. N. 



Long. 



Depth. 



Fq. 



Pl. 



29-30 VII 



78° 13' 



2° 58' W. 



2,600-0 m. 



! 

 )■ 8 C 



1 VIII 



76^36' 



12° 13' E. 



500-0 » 



r 



TS 



27 VIII 



79° 58' 



9°35'E. 



400—0 -> 



v 



SC 



1 IX 



75° 50' 



15°25'E. 



325-0 » 



v S 



5 IX 



71° 50' 



19° 2E. 



230-0 . 



r 



s \ 



