A conchological manual . cave; 50,papil-lary; Q\,mamniellated; 32, discoidal. 22 INTRODUCTION. papillary apex is one which is swelled at the extremity into alittle rounded nob, or nipple; and a mammellated apex is onewhich is rounded out more fully into the shape of a teat. spire is described as consisting of numerous or fewwhorls, and sometimes the number of them is particularlystated. A whorl consists of one turn of the spiral cone. Thewhorls are described as flattened^ when the sides are notbulged out so as to cause the outline of the spire to deviateconsiderably from straightnes
A conchological manual . cave; 50,papil-lary; Q\,mamniellated; 32, discoidal. 22 INTRODUCTION. papillary apex is one which is swelled at the extremity into alittle rounded nob, or nipple; and a mammellated apex is onewhich is rounded out more fully into the shape of a teat. spire is described as consisting of numerous or fewwhorls, and sometimes the number of them is particularlystated. A whorl consists of one turn of the spiral cone. Thewhorls are described as flattened^ when the sides are notbulged out so as to cause the outline of the spire to deviateconsiderably from straightness: when the contrary is the case,the whorls are said to be ventricose, and either rounded orangidated. The degree of rapidity with which the whorlsbecome enlarged presents an important source of distinc-tion. The suture, or seam, which separates qrie whorl fromanother is also noticed as being distinct ox otherwise;canaliculated, or grooved; or covered by an enamel, which insome instances is swelled into a ridge or Fig. 33,/eio; Q-^, numerous; fib, rounded, ventricose; ^Q, angular, ven-tricose; 37, flattened. Suture.
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Keywords: ., bookcentury1800, bookdecade1840, bookidconchol, booksubjectshells
