Tank Nr. 2U. 



31 



Tank Nr. 20. 



Pelagic Animals see Note on p. 62i. These show best in hriirht 

 sunshine from noon to twoi ; many do not live long, and 

 the tank is richest after a calm dull day. The more de- 

 licate are in wide glass cylinders. There mav be : 



Jelly fish. A. Medusae p. 60). CotylorMza (^fig. 7'J, from Sep- 

 tember to Januarvi, nearlv a foot across, like a mushroom 

 growing from an inverted caulitlower. Ehizostoma ihg. SO , 

 as large, a beautiful white globe with a violet border and 

 a swelling violet and white stalk. Pelagia (fig. 81), white 

 with nimierous spots. Carmarina (fig. 83j , two or three 

 inches long, umbrella-shaped, perfectily transparent, with 

 four long fishing-lines. Tima (fig. 82). Olindias (fig. 84 1. 



B. Ctenophora (p. 62), have each eight lines of moving 

 paddles which look like running beads of light. Beroe 

 (fig. 85), one to three inches long, shaped like a bishop's 

 mitre ; a most delicate pink. Eucharis (fig. 86), much broa- 

 der base with rounded projections, quite transparent. Col- 

 lianira (fig. 87), small with long tentacles. Venus's Girdle 

 {Cestus, fig. 88), a transparent ribbon about an inch broad. 



C. Siphonophora (p. 61), generally like transparent 

 filmy flowers on a central stalk : Phi/sophora (fig. 89) , 

 Forskalia (fig. 92), Velella (fig. 91;, Hlppopodius (fig. 90), etc. 



Fig. 79. Cotylorhiza 

 borhonica, 

 Vs nat. size. p. 60. 



Fig. 80. Rhizosfoma 

 inilmo, small specimen, 

 p. 60. 



Fig. 81. Pelagia 



noctiluca, 

 '/s nat. size. p. 60. 



