BRITISH ZOOPHYTES. 327 



serves for attachment, but not for locomotion. Edocyst 

 gelatiuoid; orifices scattered. /S'^a^oZ^Zas^.s elliptical, with 

 an annulus, but without marginal spines. — Allman. 



L. CEYSTALLiNUS, Pallas. 



Polype a Panache [Tremhley), Bell-flower animal 

 (Baker), Tubularia crystalliua (Pallas), T. campanulata 

 {Linn., Turt., Shaw), T. reptans [Linn), Plumatella 

 cristata {Lamh., Schiveigger, Be Bl.), Naisa reptans 

 {Lamx., Deslongchamps), Alcyonella tertius evolutionis 

 gradus {Raspail), Plumatella crystallina ((rery a is), Alcy- 

 onella stagnorum ((?. J., in part), L. liakevi [Van Ben.). 



Hab. : In ponds. 



The polypides of this delicate and beautiful species 

 are brownish-yellow in colour, and are enclosed in a 

 gelatinoid extension of the ectocyst which is quite 

 transparent. The tentacles are long and numerous. 

 The colony generally assumes a lobed appearance. 

 Prof. Allmann observes that the perigastric space 

 often contains spherical bodies floating about, varying 

 in size and structure, being sometimes unicellular in 

 appearance, and at others having a number of enclosed 

 smaller cells. The Professor considers these bodies 

 as having no connection with the polyzoon, and as 

 being without doubt parasitic. 



The statoblasts are elliptical, with a plain reddish- 

 brown centre, and a cellular annulus terminating at 

 each end in a point. 



Genus II. Alcyonella, Lamarck. 

 Coenoecium composed of membrano-corneous branched 

 tubes, which adhere to one another by their sides ; 

 orifices terminal. Statoblasts elliptical, with an annulus, 

 but without marginal spines. — Allman. 



