VERMES. 69 



tary, but is rapidly multiplied by the production of gemrnte." 

 (Allman.) 



These organisms are larger and more homogeneous than the 

 Gymnolaemata, aud have a soft or leathery or gelatinous struc- 

 ture, with no special stem. They are found attached to stones, 

 plants, &c. in fresh water, only one or two species being marine. 

 Cristatetta mucedo ("not unlike certain hairy caterpillars," and 

 two inches in length) is found in many of our pools, creeping about 

 in a sluggish manner. 



Ehahdopleura is an anomalous marine form from Norway ; it 

 is said to have Hydrozoan affinities. Allman would place it 

 in a distinct "suborder," for which he suggests the name of 

 Aspidophora. 



Plumatellida. Lophopus. 

 Plumatella. 

 Alcyonella. CrittatdUfa 



Fredericella. Cristatella. 



Ehabdopleura. 



