. A conchological manual. Shells. 22 INTRODUCTION. papillary apex is one which is swelled at the extremity into a little rounded nob, or nipple; and a mammellated apex is one which is rounded out more fully into the shape of a teat. Whorls. The spire is described as consisting of numerous or few whorls, and sometimes the number of them is particularly stated. A whorl consists of one turn of the spiral cone. The whorls are described as flattened, when the sides are not bulged out so as to cause the outline of the spire to deviate considerably from straightness: when the contrary is the case, th
Image details
Contributor:
The Book Worm / Alamy Stock PhotoImage ID:
REACN6File size:
7.2 MB (312.6 KB Compressed download)Releases:
Model - no | Property - noDo I need a release?Dimensions:
2840 x 880 px | 24 x 7.5 cm | 9.5 x 2.9 inches | 300dpiMore information:
This image is a public domain image, which means either that copyright has expired in the image or the copyright holder has waived their copyright. Alamy charges you a fee for access to the high resolution copy of the image.
This image could have imperfections as it’s either historical or reportage.
. A conchological manual. Shells. 22 INTRODUCTION. papillary apex is one which is swelled at the extremity into a little rounded nob, or nipple; and a mammellated apex is one which is rounded out more fully into the shape of a teat. Whorls. The spire is described as consisting of numerous or few whorls, and sometimes the number of them is particularly stated. A whorl consists of one turn of the spiral cone. The whorls are described as flattened, when the sides are not bulged out so as to cause the outline of the spire to deviate considerably from straightness: when the contrary is the case, the whorls are said to be ventricose, and either rounded or angulated. The degree of rapidity with which the whorls become enlarged presents an important source of distinc- tion. The suture, or seam, which separates one whorl from another is also noticed as being distinct or otherwise; canaliculated, or grooved; or covered by an enamel, which in some instances is swelled into a ridge or tumid.. Fig. 33, /eto; 34, numerous; 35, rounded, ventricose; 36, angular, ven- tricose; 37, flattened. Suture.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Sowerby, G. B. (George Brettingham), 1812-1884; Henderson, J. B. (John Brooks), 1870-1923, former owner. DSI; Dall, William Healey, 1845-1927, former owner. DSI. London : Henry G. Bohn