Sagitta decipiens Fowler. 



Locality (mean): 



47 10' N., 7°4S' W. 



Definitive observations: 



Oceanic. 



Not taken above 182 m. 



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



Sagitta elegans Verrill. (Chart I). 



Localities : 



4i°2o'N., 70°4o'W. 

 39 20' N., 74 25' W. 



Definitive observations wanting. 



As Verrill and Conant in some cases indicate deep-water specimens, the presumption 

 is that this species was captured at or near the surface. The localities lie well within the 

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

 temperature of about ii°C. There is nothing in this distribution inconsistent with the suggested 

 identity with arctica (pp. 30 — 32), and these waters are practically subarctic, in temperature and 

 source, through not in latitude. 



Sagitta enflata Grassi. (Charts I — III). 



Localities : 



Temperate North Atlantic, and Mediterranean; tropical Atlantic; S. Atlantic (Brazil Current, 

 and Benguela Current to the Cape); Indian Ocean and Red Sea; Malay Archipelago 

 and Japan. 



Definitive observations: 



Oceanic and neritic. 



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

 S. limit (Atlantic): 34°52'S., i7°5o'E. — M.A. c. i7°C. 

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

 Surface (absent from all closing nets). 

 Highest temperature, 32 C. 

 Lowest temperature, M.A. 16 C. 



There is no trace 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 I4°C, although at the moment the surface temperatures were 17 to i8°C. 



Sagitta ferox Doncaster. 



Localities : 



Malay (Siboga area) and Maldive Archipelagos. 



