-6 



Spadella draco Krohn. (Charts IV to VI). 



Lüca 1 i t ies : 



Temperate (X. and S.) and tropical Atlantic; Mediterranean. Tropical Indo-Australian, and Japan. 

 1 ) e f i n i t i V e <) b s e r v a t i o n s : 



Oceanic and Xcritic 



N. limit (Atlantic): 4i°36'N., s6°iS'W. • 



S. limit (Atlantic): 4i°32'S., 17° 39' E. 



S. limit (Indo-Australian): 9° S. 



Surfacc, absent from closing nets. 



Highest temperature: 29'^ C. * 



Lowest temperature: 17° 7 C. 



This distribution agrees very closely with that of cnjïata. 



The following- table siimmarises in comparative form the horizontal distribution of vaHd 

 species in the epiplankton and mesoplankton ; it contains definitive observations only '), except for 

 the inclusion of bipiinctata and of the presumably deep-water species of the Siboga Expedition. 

 The areas named are not intended as 'zoological provinces', but are used merely for convenience 

 of geographical dcscription. 



2 



EPIPLANKTON 



Atlantic Ocean 



o. 





Indo-austia- 

 lian Ocean 



a. 



a 



o. 

 S 



s 

 o 



C/3 



MESOPLANKTON 



Atlantic Ocean 



CU 



E 



o. 



E 



ARCllLA 



Beuoti 



IlIPUNCTATA 



DECIPIEXS 



ELEGANS 



ENFLATA 



FEROX 



KURCATA 



HEXAHTERA 



MACRüCEPHAI.A 



MINIMA 



NEGI.ECTA 



PLANCTONIS 



PULCHRA 



REGULARIS 



ROliUSTA 



SERRATOÜENTATA 



SlIiOGAE 



Whartoni 



Zetesios 



hamata 



pacikila 



sumii.is 



cephaloptera 



draco 



+ 



+ 

 + 



-f 



+ 



+ 



^- 



+ 

 + 

 + 

 + 



+ 



-t- 

 + 



+ 



+ 

 + 

 + 



+ 



+ 

 + 



+ 

 + 



+ 



+ 



+ 

 -i- 

 4- 



4- 



+ 

 -i- 



+ 

 + 



+ 



+ 



+ 



+ 



+ 



+ 

 + 



+ 



-t- 



+ 



4- 



+ 



+ 

 + 



+ 



+ 



-f 



+ 



4- 



+ 



+ 

 + 



+ 



+ 



+ 



+ 



+ 

 -+- 



+ 

 + 



+ 

 + 



-i- 



+ 

 + 



+ 



+ 



4- 



+ 



+ 

 + 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 



+ 

 + 



+ 

 + 

 + 



+ 



+ 1 • 

 ■ + 

 + + 



+ 



-f 



? 



+ 



+ 



+ 



-f 



-t- 

 -i- 



+ 



l) The tropical captures of furcnia in the Vcrtical nel may have Ijeen cpiplanktonic or mcsoplanktonic or both : they are 

 recordcd on Ihc lablc by an interrogation. 



