102 



ZOOLOGY. 



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

 the depth of 2435 fathoms. B. Aldrichianus occurred in 

 1850 fathoms, latitude 1° 47' K, longitude ?A° 26' W., oS 

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

 Islands occurred the interesting Hyocrinus BetheUianus 

 AVyville-Thompson, which bears in some points resemblance 

 to the palaeozoic genus, Platycrinus. 



Pig. 04.— a, Pentamnu.9 caput-medusai, half natural size: *, calyx-disk Been from 

 above, natnral size.— From Brehm's TMerleben. 



The most widely distributed species is the RMzocrinus 

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

 Bourguetticrinus of the chalk formation, and forms the 

 transitional type connecting the Apiocnnidm with the 

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



