Overview

General Books publication date: 2009 Original publication date: 1865 Notes: This is a black and white OCR reprint of the original. It has no illustrations and there may be typos or missing text. When you buy the General Books edition of this book you get free trial access to Million-Books.com where you can select from more than a million books for free. Excerpt: [Fi-om the Annual Report of the Peabody Academy of Science, January, 1869. J APPENDIX TO REPORT ON MOLLUSCA, BY E. S. litORSE. While arranging the duplicates of Essex County shells, I discovered the following interesting species, heretofore confounded with Cyclo- cardia borealis Conrad. ACTINOBOLUS Klein. Subgends Cyclocardia Conrad. Cyclocardia Novanglice Morse (nov. sp.). Shell oblong ovate, thin; beaks nearly central, recurved, rounded, not prominent. Surface of shell marked by about seventeen rounded radiating ribs, leaving narrow interspaces. Periostraca light brown, marked by delicate incremental striae. 'Lunule impressed triangular; ligament nearly concealed. Hinge plate narrow and thin, having in the left valve a small triangular tooth on a vertical line with the beaks, and a long slender lateral tooth running nearly parallel with the ligament; in the right valve a long slender lateral tooth. Interior of shell white, margins strongly creuate. Length, fi of an inch; height, f f; breadth, %. Color of soft parts in alcohol, light olive green. (plate of realis. C. N1 ovangllce. OBSERVATIONS. A comparison of this species with C. borealis Conrad will show the following important differences. The shell is elongate ovate; the beaks are nearly central; the hinge plate is only half as thick as that of C. borealis, and the shell itself is much smaller; the relative dimensions are different, while C. borealis is as high as it is long; in C. Noranalice the length exceeds the breadth nearly a sixth. It is also much more compressed. The ribs are one or two less in number and are not so s...

Full Product Details

9781150039102

Table of Contents

Reviews

Author Information

Tab Content 6

Customer Reviews

Recent Reviews

Countries Available