Manchester Memoirs, Vol /vi. (igi2), A^o. ITf. ii 



Zeiller (6) in P/. LVII., Fig: i, of Calaniites Goepperti, 

 shows a long internode below, and at least two short ones 

 above the branch internode ; it is probable that the base 

 is correctly indicated. 



Kidston (7) gives a well-preserved cast of Calaniites 

 (Calamitina) varians, Sternb., var. inconstans, together 

 with a table of measurements : — 



Internode. Measurement in mms. 



8-50 



.S' 



I 



2 



3 



4 



5 

 6 



7 

 8 



9 



10 

 II 



6-50 



5-50 



4'5o 



5" 



3' 



4" 



3"5o 



3' 



3" 



Scar internode 12 7- 



13 

 14 



15 

 16 



17 

 18 



19 

 20 

 21 

 22 

 23 



Scar internode 24 750 



25 8- 



26 II' 



27 12" 



28 I2"50 



29 12- 



30 11-50 



31 II" 



32 10-50 



Z2> 8-50 



34 9"5° 



35 6-50 



36 5" 



Scar internode 37 950 



- Period IV. 



6- 



8-50 



8- 



8- 



7'5o 

 7-50 



r 



5" 



4'5o 

 4' 

 3'5o 



Period III. 



Period II. 



