Sagitta Sibogae sp. n. 



Locality: 



Malay Archipelago (Siboga area). 

 Definitive observations: 

 Oceanic. 



Absent from surface nets. 

 Highest open net: iooo to o m. 

 Temperature at iooo m., 5 5 C. 



Sagitta Whartoni Fowler. 



Locality : 



Faeroe Channel, and N. Atlantic. 

 Definitive observations: 



Oceanic. 



Highest open net: 182 to o m. 



Deepest haul: 914 to 731 m. 



Highest temperature: between 8° 8 and I2°2. 



Lowest temperature: between — 1° 1 and — 0°5. 



Sagitta Zetesios Fowler. 



Localities : 



Temperate N. Atlantic, and Malay Archipelago (Siboga area). 

 Definitive observations: 

 Oceanic. 



Absent from surface nets. 



Highest open net; N. Atlantic, 182 to o m., young specimens; Siboga area, ? 750 to o m. 

 Lowest closing net: 1828 to 1371 m. 

 Highest temperature: ii°6C. or more. 

 Lowest temperature : 4 7 to 8°. 



It is reasonable to expect that this species will be found in the polar epiplankton, and 

 in the mesoplankton of intermediate seas between its two present localities. 



Krohnia hamata Moebius. (Charts I to III). 



Localities : 



The Atlantic, from Baffin's Bay and Spitsbergen, to the Falkland Islands: Malay Archipelago; 

 the New Zealand area; ? [Japan]. 

 Definitive observations: 



Oceanic and neritic. 



N. limit: 8i°3o' N. 



S. limit: 52°S., 58 W. 



W. limit: 58° W. 



E. limit : 168 10' E. 



Surface; 52° S. and N. of 6o° N., at temperatures not above I2°2C. 



Epiplankton : N. of 47 N., S. of 40 S., generally young specimens. 



Mesoplankton : in tropical and sub-tropical waters. 



Deepest haul: 3657 to 2742 m. 



Highest temperature: between 13 and 16 . 



Lowest temperature: — 1° 1 to — o°5- 



SIBOGA-EXPEDITIE XXI. IO 



