28 



1'ah.olin e L e e g a a k i > 



Tintinnopsis tubulosa (Levander.) 

 (Fig. 27-28.) 



1900 Levander, p. 18— 19. 



1910 Meunier, pl. 12, f. 5—8, 10-11. 



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ic 





voit 



■ 



^ ti 



The covering of this spécimen was cylindrical with 

 rounded or somewhat tapering base, which was often more 

 or less widened. The length of the npper cylindrical 

 part varied, being shorter than the lower widened part 

 in some of the coverings, while others were almost of 

 the same length as the lower part. Levander has (1900, 

 p. 18) drawn a covering] with the upper part consi- 

 derably longer than the widened lower part. All these 

 forms show différent phases of growth on the marginal 

 zone of the house. There is no reason to consider the 

 différent forms as varieties. When counting the cells 

 I have distinguished the equally cylindrical form with 

 rounded lower part (forma lineata) from the shorter 

 form with acute widened lower part (forma minor) and 

 the longer form with acute widened lower part (forma 

 major). It may be of some interest to see, how the 



species varies, without attributing too great importance to the différent forms. 



The acute forms were the more common while the form with rounded base occurrcd 



rarely. 







Fig. 27. Tintinnopsis tubulosa. 



a. F. major. 



b. F minor. 



47.'. 

 1 



^r \ 



â 





Fig. 28. Tintinnopsi s tubu losa. 



a. -F. lineata. 



b. F. major. 



c. F. minor. 



280 

 1 ' 



Tom. XLVIII. 



