260 DIXOFLAGKLI.AT.q'; PERI 1)1 XIUM 



(h-iohcr: 52' N. 21/ W. 

 Xovrinbrr: 51 N. 18 and 28 \\'. 



Temperature: 15. i, mean of 77 obs., max. 28, min. (>..-,. 



Salinity: Ho..;?, mean of 73 obs., max. '57. .50, min. 31,(iii. 



Plankton-type. The typical Pcrid. (/iro-r/ciis occurs in the 

 Mediterranean, tlie lied Sea, Indian Ocean and in the whole tropica! 

 and temperate Atlantic, but is rather rare in the Sargasso Sea and 

 Florida (lurrent. Its principal area of distribution is between tlip 

 Azores and Iceland to Scotland, whence it enters the North Sea 

 and the Skagerak and follows the coasts of Norway towards Spit/- 

 bergen, thus from 20' S. to 78^ N. It enters, as a constanl, but 

 scarce constituent, the Tripos-plankton of the North Sea. — N. {])). 



FERIDINIUM (DIVERGENS VAR.) ELEGANS Cl. 



(K. \'ei. Akad. Hand). Vol. .X.XXIV n. 1 PI. VJI lig. 15, 1(5.) 



1898 January: \2 N. 50" W.; 32' N. 74' W. 

 Marvlr. -'t" S. 10' W.; 7' N. 17 W.; 0" N. 59 W. 



May: area betweeen 23^ N. 45' W., 29' N. 39' W. and 



28'- N. 47' W. 

 June: 19' N. 63° W.; 31' N. 50' W.; 29' N. 36' W. 

 July: 21' N. 58' W.; 33" N. 74° W.; 41^— 42'^ N. 58'— 48' W. 

 August: Caribbean Sea; 34' N. 73° W.; 40' N. 66 W. to 



44' N. 42' W. 

 Srpfcnfhrr: 9^ N. 53'^ W.; 20' N. 74' W.; 41' N. iib' W. 

 October: 21° S, 36° W.; 26° N. 76° W.; 34° N. 74' W. 

 November: 8° N. 28° \V.; 26° N. 48° W.; 42° N. 64' W. to 



47° N. 41° W.; 36° N. 14^ W.; Canaries. 

 Decern her: 1>^ N. 67' W. 



1899 January: 34^ N. 12° \V. 

 March) 21° N. 43° W. 

 Api'il: 36" N. 74° W. 

 May: 35° N. 75° W. 



July: 11^—12° N. 26°— 27' W. 



Temperature: 23. s, mean of 43 obs., max. 28. ;s, min. lo. 

 Salinity: :)5.si, mean of 40 obs., max. 37.-2s, min. 32. s?. 

 Plankton-type. Occurs in the Indian Ocean. — />. 



