22 



DUBLIN UNIVERSITY 



which certainly bear a resemblance in some of its varieties to this species ; 

 but, as it is considered by good authorities to be identical with P. Miller i, 

 ours is sufficiently distinct from that species not to be confounded with 

 it. The establishing a species from the column alone is very objectionable, 

 unless under peculiar circumstances, such as its being found in a particu- 

 lar formation which has yielded no other species ; each formation hav- 

 ing, doubtless, its characteristic crinoids, as it had its other peculiar 

 organic remains. 



Locality, and Stratigraphical Range. — Several specimens of this ele- 

 gant little Pentacrinite were collected by the Rev. Osmund Fisher 

 from the Oxford Clay, Green Hill, "Weymouth, to whom it was dedi- 

 cated by the late Professor Edward Forbes. 



The following is a stratigraphical list of the fossil species belonging 

 to this genus : 



Pentacrinus priscus (Goldfuss). Devonian. 



rotundus (Austin). Carboniferous Limestone. 



subcrenatus (Miinster). St. Cassian Beds. 



propinquus „ ,, ? 



Brauni ,, ,, 



laevigatas ,, ,, 



venustus (Klien). „ 



Extracrinus ( „ ) Briareus (Miller). Lias. 



crassus (Deshayes). ,, 



moniliferus (Miinster). „ 



Extracrinus ( „ ) subangularis (Miller). „ 



scriptus (Roemer). „ 



tuberculatus (Miller). ,, 



Goldfussi(JTn>A*). „ 



gracilis (Charlesworth). Lias and Inf. Oolite. 



Milleri (Austin). Jurassic. 



basaltiformis (Miller). 



Nicoleti (Deshayes). 



cingulatus (Miinster). 



pentagonalis ( Goldfuss). 



paradoxus ,, 



tuberculatus (Mer. JDes.). 



subsulcatus (Goldfuss). Inf. Oolite and Brad- 

 ford Clay. 



