69 

 Sagitta decipiens Fowler. 



Locality (mean) : 



47°io'N., 7°4S'W. 



Definitive observations: 



Oceanic. 



Not taken above 182 m. 



Deepest hauls: 365 — 182 m., at c. ii°5C. 



Sagitta elegans Verrill. (Chart I). 



Locali ti es : 



4i°2o'N., 70°40'W. 

 39°2o'N., 74°25'W. 



Definitive observations wanting. 



As Verrii.i. and Conant in some cases indicate deep-water specimens, the presumption 

 is tliat this species was captiired at or near the surface. The locaHties lie well within the 

 influence of the cold water which bathes the north-eastern States; thej- have a mean annual 

 temperature of aboiit ii°C. There is nothing in this distribiition inconsistent with the suggested 

 identity with arcfica (\)\). 30 — 32), and these waters are practically siibarctic, in temperature and 

 source, through not in latitude. 



Sagitta enflata Grassi. (Charts I — III). 



L o ca 1 i t i e s : 



Tempcratc North Atlantic, and Mcilitciranean ; tropical .Atlantic; S. Atlantic (Brazil Currcnt, 

 and Benguela Currcnt to the Cape); Indian ücean and Red Sea; Maiay Archipelago 

 and Japan. 



Definitive o 1) s c; r v a t i o n s : 



Oceanic and ncritic. 



N. limit (.Atlantic): 40°24'X., 57° o' W. — M..\. c. 16° C. 



S. limit (.\tlantic): 34°S2'S., 17° 50' E. — M.A. c. 17° C. 



S. limit (Indo-Australian) : 29° 30' S., 42° 50' E. 



Surface (absent from all closing nct.s). 



Highest temperature, 32° C. 



Lowest temperature, M.A. 16° C. 



There is no tracé of this species as a mesoplanktonic form in any locality; it is apparently 

 an epiplanktonic and warm-water form. That its minimal temperature limit is somewhere near 

 i6°C., is confirmed by its absence from the Biscayan stations of the Research, which have a mean 

 annual of 13° to 14° C, although at the moment the surface temjieratures were 17° to i8°C. 



Sagitta ferox Doncaster. 



L o c a 1 i t i e s : 



Malay (Siboga area) and Maldive .\rchipelagos. 



