974 



CLEVE, SOME ATLANTIC TINTINNODEA. 



Undella azorica n. sp. 



House tlnn-walled, carapaiiulate, about 

 twice as long as it is broad; apical end 

 acuininate. Moutli wide, teethless. 



Length: 0,11 mm. Diameter of the 

 moutli 0,066 mm. 



Hahitat: the Azores (September 1898) 

 rare in styli-plmikton. 



Temperature: 21,2 to 21,9. 



Salmity: 36,25 to 36,30. 



Fig. 450 times magnified. 



Undella heros n. sp. 



House 9 to 10 times longer than broad, elongate 

 conical, hyaline and structureless, except at the apical 

 end, wliere it is finely punctate and has sonie faint 

 traces of some few spirally arranged folds. The end 

 is truncate and apiculate. The mouth has no den- 

 ticulation. 



Length: 0,5 mm. Diameter of the mouth 0,06 mm. 



Hahitat: very rare in the Sargasso Sea, the An- 

 tilles current, at 41°— 42° N. 51°— 63° W. and (in 

 November 1898) at 51° N. 20° W. — Desmo- or styli- 

 jjlankton. 



Temperature: 17,9 (max. 21,3, min. 14). 



Salinity: 35,86 (max. 36,59, min. 35). 



Fig. 225 times magnified. 



Undella paradoxa n. sp. 



House cylindrical, about four times as long as 

 broad, hyaline and structureless, with acute end and 

 simple mouth, without teeth. The exteriör lamella of 

 the wall forms two discoid folds near the apical end. 



