SNAIL SEA-CUCUMBER. 



203 



HOLOTHURIAD.E. 



PSOLIDJE. 



Genus Psolus. Oken. 



Generic Character. — Body irregular, ascidiform ; suckers in five rows, three 

 only of which are developed, and placed on a soft disk or foot ; tentacula ten. 



SNAIL SEA-CUCUMBER. 



Psolus phantapus. Linnaeus. 



Specific Character. — Brown ; head reddish white, with orange spots and orange 

 tentacula ; body covered with pectinated scales, or rugse. 



Holothuria phantapus, Linnaeus, Syst. p. 1089. Muller, Zool. Dan. Prod. 



2803 ; Zool. Dan. t. cxii. f. 1, 2, 3. Encyc. Meth. pi. 



lxxxvi. f. 1-3. Lamarck, 1 Edit. III. p. 73 ; 2 Edit. 



III. p. 440. 

 Ascidia rustica, Pennant, Brit. Zool. vol. IV. p. 48, t. xxxiii. f. 35. 



Cuvieria phantapus, Fleming, Brit. An. p. 483. Johnston, Mag. Nat. 



Hist. IX. p. 472, f. 8G. 

 Psolus phantapus, Jaeger, de Hoi. p. 2. Brandt, Prod. Agassiz, Prod. 



Throughout Nature we find creatures belonging to one 

 class emulating the forms of another. Here we have an 

 animal of the radiate type emulating the symmetrical forms 



