from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A taxonomic class within the subphylum Chelicerata — extinct arthropods.
Trilobita and Eurypterida, among the Crustacea; making altogether five for the great sub-kingdom of Annulosa.
This paper, with Hünicken as a coauthor, revises the identity of this fossil as a “bizarre eurypterid”, a water scorpion Eurypterida.
Amongst the molluscous animals we have members of the very highest known class, namely, the Cephalopods, or cuttle-fish class; and amongst articulated animals we find Trilobites and Eurypterida, which do not belong to any incipient worm-like group, but are distinctly differentiated
But a complete development, such as already obtains in the lobster, &c., was reached by the Eurypterida and Trilobites of the palæozoic strata; and annelids, probably formed mainly like those of the present day, abounded during the deposition of the oldest fossiliferous rocks.
Eurypterida, among the Crustacea; making altogether five for the great sub-kingdom of Annulosa.