echinoid

Although the rate of movement was slow, it was sufficiently fast to outpace the echinoid.

Conulus is an extinct genus of echinoid that lived in the Cretaceous.

Fossils which may be seen in the limestone scree are bivalve, brachipod and echinoid.

Holopneustes is a genus of echinoid.

Bothriocidaris (meaning best furrow or best trench) is an extinct genus of echinoid from the Ordovician.

Headed by Echinoid Blacksly (only member)

McPherson described E. tribuloides as a "sluggish echinoid" that leads a nocturnal, benthic existence.

One echinoid, Mellita granti, is a Sea urchin endemic to the Gulf of California.

(This is the same Nichols who produced the seminal work on the mode of life of the irregular echinoid, Micraster, in the English chalk).

Dendraster excentricus is an irregular echinoid that is flattened and burrows into the sand, unlike the regular echinoids,or sea urchins.