Subject ASC0001eqy
The Quarterly journal of the Geological Society of London.
v.43 (1887), Page 707 (1887)
Natural History Museum Library, London
BHL Page 45996984
Keywords
peristome pelanechinus corallinus Pelanechinus corallinus sea urchin echinoidea sea hedgehogs echinodermata echinozoa animal aquatic ocean sea spiny imbricating actinal plates peristomal plates actinal plates aetinal plate interambulacral area umbulacral area Peristome Actinal Plates interambulacral ambulacral dwaing geographical information