CHARACTERISTIC DEEP-SEA TYPES. — CRINOIDS. 117 
vires: 
surf 
Fig. 404. — Metacrinus angulatus. 3. 
ferences existing between the liassie and 
the modern Pentacrinide led the Austins 
to establish the genus Extracrinus for a 
fossil species which seems to have been 
gregarious, and of which Queenstedt has 
figured a magnificent slab, some of the 
specimens with a stem nearly sixty feet 
long. The stems were often twisted into 
a solid, ropelike mass, and are so entan- 
gled on the slab that it is difficult to 
make out the individual stems. A sim- 
iar entangling also occurred among the 
specimens dredged by the “ Blake," and 
it was often very difficult to separate speci- 
(Carpenter.) 
Fig. 406. — Pentacrinus 
stage of Actinometra 
meridionalis, magni- 
fied. 
