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 form 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 Brachlonus 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 ( f Be- 

 skrivelser' &c. p. 4). 



Pallas's work in which the description of Brachionux 

 cernuus appeared was published at Berlin in 1771. 



HABITAT. On zoophytes, Algae, shells, &c., between 

 tide-marks and in shallow water. 



LOCALITIES. Common and widely distributed. 



GEOGRAPHICAL DISTRIBUTION. Roscoff, dredged on 

 Vesicularia, and on Antennularia and other Hydroids, 

 common ; also on Bugula 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. 



PEDICKLLINA XITAXS, Dalyell, Bern. An. ii. pi. xx. figs. 1-12. 

 ? PEDICELLIN A AMERICANA, Leidy, Invert. Rhode Isl. and New Jersey, 

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



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



