80 



TR AX 8 ACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



All the leading sections of existing Echinodermata 

 are found at Port Erin, as follows : — 



Crinoids, Eeather-stars : Antedon rosaceus (fig. VIL, 

 1) is found in deep water off the cliffs. In the 

 young (" pentacrinoid ") stage it is fixed by a 

 long stalk to the blades of the great brown oar- 

 weed (Laminaria), as shown at 2, and magnified 

 at 3. 



1 Asterina gibbosa 2 Asterias rubens 3 OphiothrLv fragilis 4 Cucumeria planci 5 Echinus esculenfus 



Fig. VIII. 



Asterids, the common star-fish, Asterias rubens (fig. 

 VIII., 2), the Sun-star, Solaster papposxis, and 

 the little Asterina gibbosa (fig. VIII., 1) are all 

 common at Port Erin, and are usually to be seen 

 in the tanks of the Aquarium. We have fre- 

 quently deep-water forms, such as the brilliant 

 red Porania puhillus, the flat pentagonal 

 Palmipes placenta, and the pale strawberry 

 Stichaster roseus obtained on dredging expeditions. 



