73 



Sagitta Sibogae sp. n. 



Loca 1 i ty : 



Malay Archipelago (Siboga area). 



Definitive obse rvati ons : 

 Oceanic. 



Absent from surface nets. 

 Highest open net: looo to o m. 

 Temperature at lOOO m., 5° 5 C. 



Sagitta Whartoni Fowler. 



Locali t y : 



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 12° 2. 

 Lowest temperature: bctwcen — 1° i and — o°5. 



Sagitta Zetesios Fowler. 



Loca 1 i t ies : 



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 tlie 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 Raflin's Bay and Spitsbergen, to the Falkland Islands: Malay Archipelago; 

 the New Zealand area; r [Japan]. 



Definitive observations: 

 Oceanic and neritic. 

 N. limit: 81° 30' N. 

 S. limit: 52° S., 58° W. 

 W. limit: 58° W. 

 E. limit: 168° 10' E. 



Surface; 52° S. and N. of 60° N., at temperatures not above 12° 2 C. 

 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° i to — o°5. 



SinOGA-EXl'EDlTIE XXI. lO 



