BENNETTITES. 1 63 



V. 2129^. Two specimens with an involucre of broader 

 bracts surrounding a central boss. It is difficult to decide how 

 far the breadth of the bracts may constitute a specific difference. 

 These examples are somewhat intermediate between the specimens 

 referred to the variety latifolius, and the narrow leaved forms. 

 Cf. V. 27933 and V. 2129/, etc. 



V. 2254. Small portion of the annular zone. Ecclesbourne. 



Rufford Coll. 



V. 2129. Small specimens showing a central cavity bordered 

 by an annular zone of fibrous structures. 



Bennettites (Williamsonia) Carruthersi, sp. nov., 



var. latifolius mihi. 



V. 2129*. PI. XI. Fig. 4. 



Compare with a figure of Williamsonia gigas given by Oldham 

 and Morris. In the centre is a depressed boss, as in V. 2793 

 (PI. XI. Fig. 1), V. 3201 (PI. X. Fig. 4), surrounded by a narrow 

 ring, and external to this a rim of fibrous structures, about l - 3 cm. 

 broad. At a lower level than the fine radiating fibrous structures 

 (peripheral interseminal scales or abortive peduncles), we find here 

 and there an impression of a reticulately marked surface ; this 

 reticulum is probably identical with that in V. 3201 (PL X. 

 Fig. 4), and in V. 3177 (PI. X. Fig. 1). External to the annular 

 ring are the blunt and rounded tips of a few broad bracts. The 

 specimen consists of the detached basal portion of an inflorescence 

 seen from the inside. Ecclesbourne. Rufford Coll. 



V. 2129/. PI. XI. Fig. 3. 



Very similar to V. 2129 (PL XI. Fig. 4) ; an involucre of short 

 and broad bracts like those of the preceding specimen, but in this 

 case seen from the outside. In places where portions of the bracts 

 have been removed, a fine reticulate structure is seen on the rock- 

 surface. In the centre of many of the polygonal meshes a slight 

 magnification reveals the presence of a small black dot of coaly 



