8(X) iJlATO.MACEvK — C.Hv1<;T0(;KK(>S 



CHi^TOCEROS LORENZIANUS (iRAx. 



(Cl. a Treatise on tiie I'liyto-plankton J 'I. 1 lig. 13—1.");. 



1(S1)7 Dcri'/iihrr and 



1S<)S Jdmiai-y: 12—20' N. 18" W.; Azores; \\ X. [7 W.; (v N. 

 hlr W. to W) N. 'ilr W.; Caribbean Sea; 25—85 N. 

 IV W. 



February: 13^ N. 70" W. to 84° N. 71' AV. 



March: 21-^—25° N. 18^— K^ W.; Azores; U' N. 21'— 28' 

 W.; iiF N. 18" and 88" W.; 7'— 10" N. 55—58" VV.; Carib- 

 bean Sea; 28" N. 71" W.; Mf N. H4" W. 



Jpr//: Azores; '^9" N. 88° W. to 50° N. 9" W.; 7—10' X. 

 55°— 58° W.; Caribbean Sea; 12 N. 17° W. 



Mail: Caribbean Sea; 20° N. (>() W. 



Jiilij: Caribbean Sea. 



Aufjast and Septcinber: Azores; Caribbean Sea. 



Ortobci': Caribbean Sea; 12° X. ()1° W. 



Xorcinbcr: Azores. 



Deceinbor: Azores; 18 X. ()7" W. 

 1.S99 January: 83° X. 15° W. 



February: 82°— 34° X. 1-7°— 1^0 W. 



.Ur//r//:'l-7°— 1-9° X. 8°— 9° W. 



Aj>ri/: Ur N. 18° W. to 19" X. 7" W.; 82" X. 75" W. 



Temperatupe: 19.4, mean of 18 obs., max. 28.4, min. M. 



Salinity: 85.71-, mean of 29 obs., max. 8().!).;, min. 8i.7!i. 



Plankton-type. This species occurs in the tropical and tempe- 

 rate Atlantic, ronnd the Sargasso Sea, has in the spring the same 

 distribution as the Styli-plankton in general, but reaches scarcely 

 beyond 50" X. Although of frequent occurrence in the Desmo- 

 plankton of the western Atlantic, it must be considered as belonging 

 to the Styli-plankton. Occurs in the Mediterranean, Red Sea and 

 Indian Ocean. — .S. 



