106 
Plate XX 
Figure 1. 
Figure 2. 
Figure 3, 
Figure 4. 
Buckvianiceras huckmani Crickmay sp. nov., holotype, lateral aspect, about 
natural size. Small black line shows position of emergence of penultimate 
whorl. Mouth border not preserved. Dotted lines show the great thickness 
of shell substance around the umbilicus. Locality No. 15. I pper Jurassic. 
eSfcwaSras huckmnni Crickmay sp. nov., holotj^e, peripheral aspect, about 
natural size. This, as well as figure 1, shows the disappearance of ornament on 
the last whorl. (Page 62.) , , , i . i + f 
Buckvianiceras huck 7 nani Crickmay sp. nov., holotype, last quadrant oi penul- 
timate whorl, lateral aspect, about natural size. (Page 62.) , , r i 
Buckvianiceras huckmani Crickmay sp. nov., holotype, last quadrant ot penul- 
timate whorl, ventro-lateral aspect, about natural size. (Page 62.) 
