STAUROMKDUSjE — HALICLYSTUS. 



533 



developed snaiuls of longitiidinal muscle-fibers. Alteiiiatinji with these are 4 penadiailv 

 situated, longitudinal L-hamlu-is whieh communicate with the central stomach in the unihrella. 

 There are 8 broad, adradial uonads, grouped into 4 interradial pairs. Each gonad is wide 

 and triangular. These gonads begin a little above the point of junction of the stalk with the 

 disk and e,\tend to the ends of the 8 arms. Each gonad contains 100 to 150 out-folded sacs 

 arranged in 6 to 8 radiating, longitudinal rows. Gastric cirri numerous. 







Fig. ^■^<).-~Haliclystus auricula, after Clark, in Smithsonian Contributions to Knowledge. The smaller 

 figures are of natural size and illustrate characteristic attitudes. 



Color very variable, but each medusa is commonly of one color, parti-colored individuals 

 being very rare. Individuals are either blue, green, yellow, olive, orange, or very rarely red, 

 pink, or violet. Medusae of brownish and purple hues are also common. 



