PEDICELLINA NUTANS. 567 



that Pallas, who described and figured it nearly sixty 

 years before the Norwegian zoologist wrote, is entitled 

 to precedence. His description of the external £oru\ is 

 very accurate and quite sufficient for identification. He 

 mentions the soft, cup-shaped body with its tentacles, 

 the hairy or spinous stem, and the common^ branched 

 stolon. His figure is a very fair one of its class. He 

 regarded it as one of the " Seeaster-polypen,^" referable 

 to Brachionus or Vorticella. It is curious that Sars 

 considered that there was considerable affinity between 

 Pedicellina and the last-named form, and that it was a link 

 between this tribe of Infusoria and the Polypes (^Be- 

 skrivelser^ &c. p. 4). 



Pallas''s work in which the description of Bracliionua 

 cernuus appeared was published at Berlin in 1771. 



Habitat. On zoojJliytes, Algse, shells, &c., between 

 tide-marks and in shallow water. 



Localities. Common and widelv distributed. 



Geographical Distribution. Roscoff, dredged on 

 Vesicularia, and on Antennularia and other Hydroids, 

 common ; also on Biigula at extreme low-water ; (var. 

 glabra) in the littoral zone on Corallina &c. (Joliet) : 

 Naples (Waters) : Norway (Sars) : Spitzbergen, smooth 

 var. (Smitt) : Heligoland (Nitsche) : White Sea, smooth 

 var. (Mereschkowsky) . 



Pedicellina nutans, Dalyell. 

 Woodcut figs. 37, 38, 40. 



Pedicellin.\ nutans, Dalyell, Eera. An. ii. pi. sx. figs. 1-12, 

 ? Pedicellina amekicana, Leidy, Invert. Rhode Isl. and New Jersey, 

 Journ. Ac. N. So. Pbiladelph. ser. 2, iii. 135, pi. x. fig. 25. 



Body small, vase-shaped, regular, not gibbous on the 



