Tank Nr. 20. 



Tank Nr. 20. 



Pelagic Animals (see Note on p. 62). These show best in bright 

 sunshine (from noon to two> : many do not live long , and 

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

 are in wide glass cylinders. There may be : 



Jelly fish. A. Medusae (p. 60). Cotylorliiza (fig. 79, from Sep- 

 tember to January), nearly a foot across , like a mushroom 

 growing from an inverted cauliflower. Rhizostoma (fig. 80), 

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

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

 with numerous spots. Carmarina i.fig. 83), two or three inches 

 long, umbrella-shaped, perfectly transparent. Tima (fig. 82). 

 Olindias (fig. 84 . B. Cteno, phora (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 broader base with rounded projections, quite transpa- 

 rent. Callianira (fig. 87), small with long tentacles. Venus's 

 Girdle (QffituSi fig. 88), a transparent ribbon about an inch 

 broad. C. Siphonophora (p. 61), generally like trans- 

 parent filmy flowers on a central stalk: Physophora (fig. 89), 

 Forskalia (fig. 92), Velella i v fig. 91), Hippopodiiis (fig. 90), etc. 



79. Qoti/lorhii 

 borbonita, 



uat. <ize. p. tin 



Fig. 80. Rhizostomu 

 -Hilnto, small specimen. 



p. 60. 



Fig. 81. Peltigia 

 noctiluca, 



\ 3 uat. ^ize. p. 60. 



