44 Pp. T. CLEVE. PLANKTON, COLLECTED BY THE SWEDISH EXPEDITION TO SPITZBERGEN. 
Surface: 
Date. | Lat. N.| Long. | Temp. Sal. Fq. Pl. 
] 
gvr | 70°54’ 20°43 E.| 7,15 | 34,83 c Cs 
31 VII 7714 | @34' EB! 5,35 34,77 ¢c Ss 
1VnI| 76°36 12 8 E. 7,38 | 35,12 | + ST 
29 VIIL| 77°38’ 11°40'E,, 6 34,89 rj FS 
29 VIIT} 77°23’ |10°53’E.| 5,55 | 35,03 e | 78 
30 VI} 77 8 FE, 565 | 9503 | ¢ | 8 
30 VIIL! 76°45’ | 8°45’E. 5,34 | 84,92 | c | Ss 
31 VII | 76°27’ |10°48’E.| 5,35 35,03 | ce s 
21X 75° 24’ | 16°47’ E.| 5,64 35,12 + T (S) 
Corethron hystrix Hensey. — This species is probably identical with C. crtophilum 
Castr. from the Antarctic Ocean. According to a recent publication of Dr. LeupuGEr 
Fortmorex * this species occurs West of Africa in the region of Cape Verde together with 
Chetoceros scolopendra Cr. (=C. spinosum Lxup.). Both are found also by me in a 
gathering (March 1898) from the same region. In March and April 1898 this species 
was found, besides, in the region of the Canaries and from the Azores to the mouth of 
the English Channel, in June and July around the Shetlands. In case CU. hystrix be 
identical with C. criophilum this form goes thus, following the western coast of Africa, 
from the Antarctic to the Arctic region. It has also (once in March 1898) been seen 
North of the South American coast, but not in the intermediate region of the Sargasso Sea. 
The Corethron hystriz, although in general of rare occurrence, is a species of considerable 
interest and belongs evidently to the styliplankton. ~ 
Surface: 
| 
Date. | Lat. N. | Long. Temp. Sal. Fq. Pl. 
| 
| 
29 VL 77 38 | 11°40° FE) 6 34,89 vr TS 
Q9 VIL: 77°23’ | 10°53’ E.| 5,55 35,03 r TS 
31 vit | 76°26 10°43’! 5,35 | 35,03 |r s 
11X 76°2' (138° YE) 6,61 35,138 c ST 
21x | 75°24 |\te47’B| 564 | 3512 |» T (8) 
61x | 70°93’ |20°32'B} 9,37 | B441 |» | Tp Ns 
Coscinodiscus oculus iridis Ens. 
Surface: 
Long. Temp. Sal. Fq. Pil. Date. | Lat. N. | Long. Temp. Sal. Fq. Pil. 
| | 
30 V | 63°13" | 5°15’ E. R17) Bd,538 " Tp Ns | 23VI 77 15’ | 2710'E.) 0,97 33,15 c eT 
10 VJ ; 71°10’ | 21 31’ BE. 6,71 | 35,20 + Cs 3 VII) 77 46" 2618 EB. 1,23 30,98" + C (Ng) 
12 VI | 78°40’ | 22°40" E240 , 85,05 r c 15 VIL} 78°38" | 34°30'E.| 1,52 32,21 r c 
, BVI | 7725) 27 30' EK. —0,35 | 32,97 16 VIIL| 78°27 32°30'E.| 1,52 33,46 r CNg 
| Q3VI | 7715’ | 27°10'E. 0,97 | 33,15 21X 73 50! | 15°32’ E.| 5,52 35,01 r TS 
+ + 
ae. 
* Diatomées marines de la céte occidentale d’Afrique. S:t Brieux 1898. 4:0. 
