7i 

 Sagitta macrocephala Fowler. 



Localities : 



Faeroe Channel; Bay of Biscay; Siboga area. 



Definitive observations: 



Oceanic, mesoplanktonic '), 

 Highest closing net; 877 to 639 m. 

 Lowest closing net; 3657 to 2742 m. 

 Highest temperature; io° C. 

 Lowest temperature; 2° 5 to 3 C. 



So far as it is at present known, this species is purely mesoplanktonic, but it is not 

 impossible that it may come to the surface in polar waters. Its occurrence in the Faeroe 

 Channel and in the Siboga area would seem to indicate a wide distribution in intermediate 

 seas at considerable depths. 



Sagitta minima Grassi. 



Localities: 



Mediterranean and (?) Japan. 



Definitive observations: 



Neritic. 



Surface at M.A. 19 and 2i°C. 



Sagitta neglecta Aida. 



Localities: 



Malay Archipelago and Japan. 



Definitive observations: 



Neritic. 



Surface at 28 to 29 C, and M.A. 2i°C. 



Sagitta planctonis Steinhaus. 



Localities: 



Tropical [and ? temperate N.] Atlantic. 



Definitive observations 2 ): 



Neritic and oceanic. 



N. limit: r°46'N„ I7°i8' W. 



S. limit: i6°5o'S., I2°E. 



Surface. 



Highest temperature : 27 C. 



Lowest temperature: i8°8 to 20 C. 



1) Omitting some doubtful young specimens at higher levels. 



2) Omitting the very doubtful Biscayan and Siboga records. 



