' DINOl r,A(;KLr,AT.V, — lirsTlDMIS 2ol 



June: area betwfen 10 X. 'rl \\'., .M.idcini, 10 X. 'M \\. and 



Porto Kico. 

 .//^///: area between Ihc A/ores, 41'^ N. • 58'' \V.. )V.\ X. 71- 



\V. and 15 N. 1\ W. 

 Aii(jfisr: ll" X. 70 W. lo :')i X. 7:5 W.; i-0 X. 50 \V. to 



i-5 N. 4H W.; A/oivs. 

 Sc/ircnihrr: S. of Cape X'crde Islands; sparingly from . N. 



5o- AV. to the Azores; 20-— 38^ N. 14: •W. 

 October: 21 - S. 36' 'W.;(:aribbean Sea; 84° N. 74^ W.; Azores. 

 Xovcinhrr: 26°— 24° S. 80'— 29° W.; 13° S. 27" W. to ()- S. 



32° W.; 18 X. 57 W.; 22 X. 58 \V.; 20 N. 48 \\.. 



Azores to 84" X. 10 W. 

 Ik'ceiiibiT: 26° S. 45° W.; 18° X. 67 W. lo 25 X. 52' W.; 



31-' N. 88° W.; area between Ihc A/ores, (iihrallai- and llie 



Canaries. 

 189U January: area between the Canaries, Madeira and Cihialtar. 

 March: 21°— 24° N. 43°— 40° W.; 35° N. 16° W. 

 April: 32°— 36° N. 75°^74° W.. 

 Mail: 29°— 25° S. 9°— 7° K.; 86^ X. 75° W. 

 June: 17' S. 2 W. to 9 X. 25 W.; 21 X. 11 \V.; 27 X. 



89° W. 

 July: 11-12 X. 26- 27^ W.; 82' X. 11' W. to iO X. 



88^ W. 



Temperature: 22. s, mean of 150 obs., max. 28. min. 17. 



Salinity: ;>*').ii. mean of 120 obs., max. 87.03, min. 38.^0. 



Plankton-type. Tiiis species is one of the most characte- 

 ristic organisms of the Desmo-planklon. It occurs outside the Atlantic 

 in the Adriatic, .Mediterranean, IUmI Sea, hi(han and I'acilic. In the 

 Atlantic the area of distribution is the tro[)icai and subtropical region, 

 between Africa and America, at least from 29° S. to the Azores, 

 where it occurs the whole ye^r. The northern limit in the west is 

 during the the winter about 85' X. The northern limit advanced in 

 May beyond 40' N. nearly to 'ilr. but in September it had retired 

 below 40°, but on the other hand llic area of distribiilion moved in 

 November-- .lanuarv towards the Canaries and (iibi-all.ir - 1 1 



