103 ZOOLO&Y. 



to Mhizocrinus, and was dredged in the Bay of Biscay at 

 the depth of 3435 fathoms. B. AldricManus occurred in 

 1850 fathoms, latitude 1° 47' K, longitude 34° 26' W., off 

 the coast of Brazil. With it and also near the Orozet 

 Islands occurred the interesting Hyocrinus Bethellianus 

 Wyville-Thompson, which bears in some points resemblance 

 to the palasozoic genus, Platycrinus. 



Fig. 64. — a, PentacrinuJi caput^medusce, half niitural size; 6, calyx-disk seen from 

 above, natural size. — Prom Brehm's Thlerleben. 



The most widely distributed species is the Bhizocrinns 

 lofotensis of Sars (Fig. 65), which is closely related to the 

 Bourguetticrinus of the chalk formation, and forms the 

 transitional type connecting the Apiocrinidm with the 

 free-moving, unstalked Antedon. It occurs at the depth of 



