KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 32. N:0 3. 



23 



The Fig. 1, Pl. I represents on empty shell, which is very hyaline and structureless. 



The animal inhabits the central ovate cavity, which on alcohol-preserved specimens was 



quite filled by a granular mäss. 



Diam.: 0,i8; height 0,096; diam. of the opeiiing 0,028 mm. 

 Surface: 20. VIII. 80° 8' N. 16°32'E, Temp. 3,44. Sal. 33, so. 

 Habitat: fouiid recently on the coasts of Danmark, Holland and England. 



Ptychocylis amita Brandt. 



Surface : 



Uate. 



Lat. N. 



Long. 



Temp. 



Sal. 



Fq. 



Pl. 



1 VI 



66° 42' 



10° 30' E. 



8,53 



34,59 



)-X 



TTpNs 



28 VIII 



78° 23' 



10° 23' E. 



6,06 



34,94 



+ 



TiNg) 



29 VIII 



77° 38' 



11° 40' E. 



6 



34,89 



r 



ST 



31 VIII 



76° 12' 



12°18'E. 



6,26 



35,15 



c 



S 



IIX 



76° 2' 



13° 8'E. 



6,61 



35,13 



c 



ST 



2 IX 



75° 50' 



15°32' E. 



5,52 



35,01 



+ 



ST 



2 IX 



75° 24' 



16° 47' E. 



5,64 



35,12 



+ 



T(S) 



3 IX 



74° 42' 



16°42' E. 



7,24 



35,17 



c 



T(S) 



4 IX 



73=36' 



18°50' E. 



7,06 



35,03 



r 



S{Ns) 



4 IX 



72° 43' 



18° 43' E. 



8,8 



35,01 



+ 



Tp Ns 



5 IX 



71° 57' 



19° E. 



9,08 



34,96 



r 



Tp (Ns) 



5 IX 



71° 14' 



19°38' E. 



9,40 



34,92 



r 



Tp jVs 



As the planktontype Ns is derived from T, it is from the above dates evident that 

 this species belongs to the trichotype. 



P. obtiisa Brandt. Being unable to distinguish between P. obtusa and P. Drygalskii 

 Brandt, I believe that the above name comprises both. 



Surface : 



Date. 



Lat. N. 



Long. 



Temp. 



Sal. 



Fq. 



Pl. 

 C 



Date. 



Lat. N. 



Long. 



Temp. 



Sal. 



Fq. 



Pl. 



12 VI 



73° 40' 



22°40'E. 



2,40 



35,05 



7* 



20 VIII 



80° 45' 



26° 40' E. 



0,13 



32,20 



r 



Ng 



20 VI 



74° 53' 



20°17'E. 



0,16 



34,76 



?• 



C{Ncj) 



20 VIII 



81° 8' 



23°35'E. 



0,71 



32,84 



c 



Ng 



21 VI 



76° 27' 



25°55' E. 



0,24 



33,68 



7" 



(C) 



21 VIII 



80° 31' 



18° 50' E. 



2,42 



33,93 



+ 



NgT 



23 VI 



77° 15' 



27°10' E. 



0,97 



33,15 



+ 



(C) 



24 VIII 



80° 8' 



16°32'E. 



3,44 



33,59 



r 



{Ng) 



25 VI 



76° 34' 



17°24' E. 



0,6 



33,80 



+ 



— 



25 VIII 



79° 53' 



11°22' E. 



2,77 



33,75 



+ 



C(S)Ng 



26 VII 



78° 13' 



7°30'E. 



5,34 



34,89 



r 



— 



27 VIII 



79° 58' 



9°35°E. 



4,58 



34,53 



T 



T 



3 VIII 



77° 46' 



26°18'E. 



1,23 



30,98 



r 



{CNg) 



28 VIII 



78° 23' 



10'23' E. 



6,06 



34,98 



T 



T{Ng) 



4 VIII 



78° 18' 



28° E. 



2,12 



33,01 



+ 



NgC 



29 VIII 



77° 38' 



11° 40' E. 



6 



34,89 



V 



TC 



15 VIII 



77° 48' 



32°53' E. 



1,55 



33,20 



+ 



(C) 



29 Vin 



77° 23' 



10°53'E. 



5,55 



35,03 



C 



TS 



15 VIII 



78° 38' 



34°30' E. 



1,52 



33,21 



+ 



C 



30 VIII 



77° 



8°3' E. 



5,65 



35,03 



r 



S 



16 VIII 



78° 27' 



32°30'E. 



1,52 



33,46 



c 



NgC 



30 VIII 



76° 45' 



8°45' E 



5,34 



34,92 



r 



S 



18 VIII 



79° 55' 



32°10'E. 



— 0,58 



33,21 



r 



NgC 



31 VIII 



76° 27' 



10°43' E. 



5,35 



35,03 



+ X 



S 



19 VIII 



80° 27' 



30°15'E. 



— 0,90 



32,03 



c 



Ng 



3 IX 



74° 42' 



16° 42' E. 



7,24 



35,17 



r 



TLS) 



20 VIII 



81° 14' 



22° 50' E. 



0,38 



33,42 



+ 



T 

















This species is evidently an arctio neritic form, characterizing the type Ng. 



