6G 
POPULAR SCIENCE REVIEW. 
fcributed in the deep waters, its representatives having been met 
With in all parts of the ocean at depths varying from 400 to 
2500 fathoms. The species here described under the name of 
Hymenaster nobilis , was obtained from a depth of 1,800 
fathoms, with a bottom of Globigerina-o oze at a station 1,099 
miles south-west of Cape Otway, in lat. 50° l' S., and long. 
123° 4" E. The bottom temperature was only 0.3° C. 
( = 32'4° F). 
Hymenaster nobilis is a large species, measuring about a foot 
in diameter from tip to tip of the arms, the spaces between 
Fig. 5. 
Hymenaster nobilis , Wyv. Thomson. (Half natural size.) 
which are entirely filled up by fleshy webs, so that the general 
form of the body becomes a regular pentagon, very much as in 
the genus Pteraster , to which Hymenaster is nearly allied. The 
whole upper surface of the body and arms is covered with 
