328 NATURAL HISTORY OP 



1. A. ruNGOSA, Pallas. 



Tubularia fungosa {Pallas), Spongia lacustris 

 [Schmiedel) , A. fluviatile {Briigiere, Bosc, Lamx., Ras- 

 pail,Gervais),A. stagnorum [Lamh., 8chiveigger,Lama;., 

 Meyen, JEhrenherg, Be Bl., Gams, Dumortier, Teale, 

 G. J., D. B., J. Alder, Siehold), A. anceps {BalyeU), 

 A. gelatinosa {BalyeU). 



Hab. : Canals, rivers, &c. 



This species grows in large brown fungoid masses 

 attached to submerged branches or twigs, stones, &c. 

 The ectocyst covers the extremities of the tubes of 

 which the colony is composed with a gelatinous 

 covering. The tubes are five or sis-sided, and run 

 side by side, presenting a honeycombed appearance. 

 The statoblasts are broadly elliptical, with an areolated 

 disc and a cellular annulus without spines. 



2. A. Benedeni, Allman. 



Hab. : Stagnant waters, River Chelmar, Essex 

 {Prof. Allman). 



This species is smaller than the preceding, and has 

 the extremities of the tubes of which the colony is 

 composed free from each other. The statoblasts are 

 bean-shaped, with mammilated discs and annuli. 



3. A. PLABELLUM, Vail Benoden. 

 Hab. : Slowly running waters. 



This is a small species, and is easily distinguishable. 

 It grows to the length of about | inch, and presents 

 the appearance of two fan-shaped bundles of tubes 

 united at their bases by a single short tube. Each 

 tube has a furrow along its upper surface. The colour 

 is dark brown. The statoblast is described by Van 

 Beneden as " broadly elliptical.'" The polypides have 

 about 40 tentacles. 



