190 LTVERPOOL MARINE BIOLOGY COMMITTEE REPORT. 



recently in the Regent's Canal by Mr. Bousfield. Probably 

 a good search in our estuary and docks might lead to its 

 discovery. 



Sub-class II.— Entoprocta, Nitsche. 

 Order.-PEDICELLINEA. 

 The only order. 



Family I. — Pedicellinid^. 

 Syn. Pedicellince, Johnston. 



Genus Pedicellina, Sars. 

 Syn. Hydra (part), Bosc, Blainville. 

 Contains three British representatives. 



Pedicellina cernua, Pallas. 



" Fleshy Polypes of a red colour and a particular kind." Ellis. 

 Pedicellina echinata, Sars., Hassall, Smitt, &c. 

 Pedicellina helgica, Gosse, Hincks. 



Both the smooth and spinose varieties of this species are 

 common in the Isle of Man (Lomas). 

 Pedicellina gracilis ^ Sars. 



Isle of Man; Fleetwood, on a buoy; Llandudno (Hincks). 



Dredged by Prof. Herdman between Port Erin and the 

 Calf (ten to fifteen fathoms). 



Var. nodosa, nov. (PI. Ill, fig. 2). 



Among the material dredged in the Isle of Man, I found 

 the form which Hincks describes as having the stem " very 

 much elongated, and consists of several sections separated by 

 knots or swellings^ which are also muscular in character." 

 At first I thought it was P. helgica. Van Beneden, which is 

 characterised by a swelling in the stem, but on separating 

 the stolon from the sea weed on which it was growing, I 

 discovered that on the same stolon there was the ordinary 

 form without the medial swelling. The swelling in P. 

 helgica, moreover, is gradual, while in this form it is abrupt 

 and sharply defined from the rest of the stem. 



