KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 32. w:o 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 mass. 
Diam.: 0,18; height 0,096; diam. of the opening 0,023 mm. 
Surface: 20. VIII. 80° 8'N. 16°32'R. Temp. 8,44. Sal. 33,59. 
Habitat: found recently on the coasts of Denmark, Holland and England. 
Ptychocylis acuta Branpt. 
Surface: 
Date. | Lat. N. | Long. Temp. Sal. Fg. Pi. 
1VI | 66°42’ |10°30'E.| 853 | 84,69 | »x | TTpNs 
28 vil | 78°98 | 10°23 B.| 606 | 8404 | + | TW) 
29 VIII) 77°38" |11°40'E| 6 34,89 | + ST 
31 VIII] 76°12 |12°18'E| 626 | 3515 | s 
lie | wo te oH) Gen | Be | 2 ST 
21x | 75°50' 115°82' EB) 552 | 35,01 | + ST 
21x | 75°24’ 1647 B) 564 | 3512 | + | 7(8) 
3IX | 74°49 |16°49'H) 7,04 | 8517 | ¢ | r(s) 
41X | 78786 | 18°60'E.| 7,06 | 35,03 | + | S(Ns) 
41X | 72°43’ |18°43' EB] 88 39,01 | + | Tp Ns 
51x | 71°57 | 195. | 908 | 8496 | » | Tp(Ns) 
51x | 71°14’ {19°38 BH] 940 | 3492 | » | TNs 
As the planktontype Ns is derived from T, it is from the above dates evident that 
this species belongs to the trichotype. 
P. obtusa Branpr. Being unable to distinguish between P. obtusa and P. Drygalskiit 
Branpt, I believe that the above name comprises both. 
Surface: 
Date. | Lat. N.| Long. Temp. Sal. Fq. Pl. Date. | Lat. N. | Long. Temp. Sal. Fq. Pl. 
12 VI 73° 40" | 22°40' BE. 2,40 | 35,05 r Cc 20 VIII] 80°45’ | 26°40'E.| 0,18 32,20 r Ng 
20 VI 74 53’ | 20°17' E. 0,16 | 34,76 r C(Ng) | 20 VIIL} 81°8' | 23°35'E) 0,71 32,84 c Ny 
21 VI 76° 27' | 25°56’ E. 0,24 | 33,68 r (C) 21 VIII} 80°31’ | 18°50’ E) 2,42 38,93 + Ng T 
23 VI 77 15! | 27°10' E. 0,97 | 33,15 + (C) 24 VIIL) 80°8’ | 16°32’E| 3,44 33,59 r (Ng) 
25 VI 76° 34’ | 17°24’ E. 0,6 33,80 + — 25 VIIL| 79°53’ | 11°22’E) 2,77 38,75 + | C(8)Ng 
26 VIL | 78°13’ | 7°30'E. 5,84 | 84,89 r = 27 VIII} 79°58’ | 9°35°E.) 4,58 34,53 r T 
3 VIII | 77°46’ | 26°18’ E, 1,23 | 380,98 r (C Ng) | 28 VIII | 78°23’ | 10°23’ E.) 6,06 34,93 7 T (Ng) 
4 VIIl; 78°18’ | 28°E. 2,12 | 838,01 + NgC | 29 VIII) 77°38’ |11°40'E.) 6 34,89 r TC 
15 VIII | 77° 48" | 82°53’ E. 1,55 | 33,20 + (C) 29 VII] | 77° 23' | 10°53’ E., 5,55 35,08 c TS 
15 VIII} 78° 38’ | 34°30’ E. 1,52 | 33,21 + Cc 30 VIII] 77° 83’ E. 5,65 35,08 r 8 
16 VIII | 78°27’ | 82°80’ E. 1,52 | 83,46 c NgC | 80 VIIL| 76°45’ | 8°45'E| 5,34 34,92 r 8 
18 VIII | 79°55’ | 82°10’ E.| —0,58 | 38,21 r NgC | 31 VII} 76°27 | 10°43’) 5,85 35,08 | +x 8 
19 VIII | 80°27’ | 30°15’ E.; —0,90 | 32,03 c Ng 3 1X 74 42’ | 16°42’ EB) 7,24 85,17 , T (8) 
20 VIII | 81°14’ | 22°50’ E. 0,38 | 383,42 + T 
This species is evidently an arctic neritic form, characterizing the type Ng. 
