table, are such as are shewn in Fig. 288 for the ratio aã₤ãã₤b =ã₤3ã₤ãã₤1, and in Fig. 289 for the ratio aã₤ãã₤b =ã₤1ã₤ãã₤2ã₤; these are fair apôÙproxôÙiôÙmaôÙtions to the actual outôÙlines, and to the actual arôÙrangeôÙment of the lines of growth, in such forms as SoleôÙcurôÙtus or CulôÙtelôÙlus, and in TelôÙlina or PsamôÙmobia. It is not difôÙficult to introôÙduce a consôÙtant into our equaôÙtion to meet the case of a shell which is somewhat unsymmetrical on either side of
Table of Contents
CHAPTER XI THE LOGARITHMIC SPIRAL
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