Overview

Excerpt from Bulletin No; 5 of the Illinois State Museum of Natural History: New Genera and Species of Echibodermata Commencing at the lower end, we have, first, a small, round piece that attached to some foreign object, but which is papil lose and pierced with pores just as the plates are above. It isfollowed by a range of eight small plates. There are eight larger plates in the second range and eight still larger plates in the third range without any intercalated plates. Between the third range and what may be called the fourth range there are twelve small plates, principally on the ventricose side. There are eight large plates in the fourth range. Above the fourth range the plates are polygonal of variable size and irregularly disposed. If they could be thrown into ranges there would be six or seven ranges between the fourth range and the mouth. The ambulacral orifice is somewhat marginal, but at the sum mit. It is subpentagonal in outline, about twice as wide as long, and surrounded with seven plates. There are sears for five spines. Two plates separate the ambulacral orifice from the mouth. The mouth is hexagonal in outline and located subcentrally, or about one-half its diameter anterior to the center, and is lower than the ambulacral orifice. A large pustule on the plate adjoining the mouth and between it and the ambulacral orifice bears a large pore that is called the anal opening. The specimen from which this species is described is almost as perfect, so far as the outer test is concerned, as it was the day the animal died. It is so different from all hitherto described that no comparison with any of them is necessary. Found by J. F. Hammell, in the Niagara Group, near Madison, Indiana, and now in his collection. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Full Product Details

9781332299904

Table of Contents

Reviews

Author Information

Tab Content 6

Customer Reviews

Recent Reviews

Countries Available