•>'>0 I)IAT0MACK/1', — HKMIDISCUS 



March: 7 N. hh' W 

 Jii/ir: 10 N. i)-\' W. 



Temperature: 2't-.H. mean of o obs., max. 27.:=, min. 21.o. 

 Salinity: 36.oi (one obs). 



Plankton-type. Noted from the (iulf of (iuinea, the Mediter- 

 ranean, the I toil Sea, (nilf of Itengal, Java and .lapan. — Xf. 1). 



HEMIDISCUS CUNEIFORMIS Wallich. 

 ;]\licrosc. .Journ. Vul. VIK, 1860 PI. II fig. :-!— 4. l-limilia (ivriiatu Schiioder.) 



1897 Ih'vmnbiT and 



1898 Januarii: 46" N. 11" W. to the Azores; 12 N. Mr W . 

 Fchf/iari/: (Caribbean Sea; H1'^ N. 74" W. 



March : m- N. 29' W.; Caribbean Sea. 



Ap7vl: Caribbean Sea. 



Maif: 48- N. 25' \V.; 4:-i- X. ll'^ W.; Azores; 2,H- N. 56' W 



Jimc: 18- N. 33' W.; Azores; 31° N. 17° \V.; 19" N. (53' W. 



./(^//y: 49' N. 22- W.; Azores; Caribbean Sea. 



August: Azores; 44- — 42" N. 42' — 50' \V.; Caribbean Sea. 



September: Azores; 6(5' N. IH" \V., very rare; 9" N. 53' W- 



October: 21^ S. 3H W.; Azores; 5()' N. 31° W.; 57' N. IS- 



W ; Caribbean Sea. 

 Xoveinber: Azores; 5tr N. 23' W. 

 December: 29- S. 49' W.; Azores; IS N «57' W. 

 1898 January: 45- N. 49- W 

 February: 34' N. 40' W. 

 Aiu-il: 46' N. 13' W.; 41" N. 17" W 

 October: 56° N. 31° W. 



Temperature: 20. n, mean of 53 obs., max. 2S.o, min. 1U.^, 

 e.xeeptionally 7. 



Salinity: 35.,-,i;, mean of 34 obs., max. 36.59, min. 32.iiii. 



Plankton-type. Occurs in the Mediterranean and Indian Ocean. 

 This species belongs the Styli-plankton of the western and eastern 

 warmer Atlantic. It occurs beyond 50' N. as rare specimens only 

 and was in September seen N. of Iceland. — N. 



