lOG 



PLUMATELLA ALLMANI. 



9. Plmnatella Allmani, Hancock. 



Fie. IC* 



Specific cAaracter. — CcEnoecium adherent, creeping ; cells claviform, keeled. Tentacula 

 forty-two ; calyx distinctly festooned. Statoblasts elongated. 



Synonym. — 1850. Plmnatella Allmani. Hancock, Ann. Nat. Hist., 2d series, vol. v, p. 200, 

 pi. 5, figs. 3-5. (Original figures.) 



Iconography ^ — Original figures by Hancock. 



Habitat.— Lakes, attached to the under side of stones. 



Locality. — Bromley Lough, Northumberland, rather abundant. Hancock. 



I have not met with this Polyzoon. Mr. Hancock, who discovered it along with several 

 other species in Bromley Lough, in the county of Northumberland, describes it as follows : 



" Polypidom attached to the under side of stones, adhering throughout ; membranous, 

 opaque, yellowish-brown, slightly branched, extending in patches sometimes three or four 

 inches wide, the patches being made up of several polypidoms ; the branches composed 

 apparentl)' of a series of tubular cells, tapering to their origin, and attached for more than half 

 their length ; the enlarged extremity being free and bending upwards, inclines a little to one side, 

 and is occasionally bifid, forming two cells ; an obtuse ridge or keel extends the entire length 

 of the cell, increasing imperceptibly in thickness upwards ; orifice somewhat constricted, the walls 

 immediately below being pellucid and suddenly dilating, become abruptly opaque and thickly 

 covered for some distance downwards with agglutinated sand. Tentacles forty-two in 

 number, slightly tinged with yellow, the colour best seen when they are formed into a com- 

 pact bundle ; membrane at their base distinct, scalloped, the point being prolonged a little 



* Figure copied from Hancock. 



