282 



Dr. W. B. Cai-jjenter oa the 



cessive stories of chambers (a^ a*, a^ A^), the chambers of 

 one story usually opening into one another like apartments 

 en suite, but being occasionally divided by complete septa 

 traversed by passages, as at b h. Each chamber is enclosed 

 in a chamber-wall, B b, which, when well preserved, alike 

 in sections and in internal casts, exhibits a fine nummuline 

 tubulation, generally perpendicular in its direction, but fre- 

 quently presenting exactly those varieties which I have figured 

 and described in the tubulation of the recent Operculina. I 

 freely admit that there are two anomalies in the arrangement 

 of this tubulated chamber-wall : — first, that it covers the floor, 

 resting on the preformed intermediate skeleton, as well as 

 forms the ceiling ; and, second, that its tubulation is sometimes 

 horizontal. But looking to the wonderful variability of the 

 Foraminiferal type, and the number of the parallelisms exhi- 

 bited in the calcareous structure here represented to the known 



Fio-. 2. 



Structure of Eozoon canadense. 



forms of Foraminiferal organization, I ask whether, in the 

 face of the continual discovery of far more strange anomalies 

 (as in the case of ParA:er/a), these entitle anyone to affirm 

 that this structure is a mere pseudomoi-ph. If the accuracy 

 of that representation is questioned or denied, I have simply 

 to say that I can prove it to any one who will examine the 

 preparations in my possession. 



4, The " intermediate skeleton " (fig. 2, C c) precisely 

 corresponds in its disposition, and in the distribution of the 

 canal-system (e) which traverses its thicker layers, with the 

 intermediate skeleton of Calcarina, another type fully eluci- 

 dated by me, to which Mr. Carter makes no. reference ; and 

 there is this further very curious correspondence — that the 



