386 REPORT—1850. 
7. Plumatella Allmani, Hancock. 
Spec. Char.—Ceenecium adherent, creeping ; cells claviform, keeled. Ten- 
tacula 42. Calyciform membrane distinctly festooned. Ova narrow. 
SYNONYMS. 
1850. Plumatella Allmani. Wancock, Ann. Nat. Hist. 2nd series, vol. v. 
p- 200. pl. δ. f. 3-5. (Original figures.) 
Distribution.—England. 
8. Nova species. Plumatella elegans, Allman. 
Spec. Char.-—Ceeneecium adherent, creeping ; cells of uniform diameter, fur- 
rowed and carinated. Calyciform membrane but slightly festooned. Ova 
broad. 
Distribution.—Treland. 
9. Nova species. Plumatella Dumortieri, Allman. 
Spec. Char.—Ccenecium adherent, irregularly branched ; cells somewhat di- 
lated towards the orifices, furrowed, carinated. Tentacula about 50, 
festooning of calyciform membrane deep and distinct. Ova broad. 
Distribution.—England. 
10. Nova Species. Plumatella jugalis, Allman. 
Spec. Char.—Cceucecium adherent, consisting of two series of branches con- 
᾿ nected by a common tube and extending in opposite divections; cells of 
uniform diameter, with a furrow which passes below into a keel. Ten- 
taculaabout 40, calyciform membrane with shallow festoons. Ova not known. 
Distribution.— England. 
Genus 5, FREDERICELLA, Gervais (1838). 
Gen. Char.—Ccenecium confervoid, composed of a membrano-corneous 
branched tube, with the branches distinct from one another and terminated 
by the orifices. Lophophore nearly circular, tentacular crown campanu- 
late. Ova bean-shaped, destitute of annulus and spines. 
Species unica*. J’redericella sultana, Blumenbach. 
Spec. Char.—The same as that of the genus. 
SYNONYMS. 
1777. Tubularia sultana. Blumenbach, Handbuch der Naturgeschichte. 
(Original figure), 
1789. Tubularia sultana, Gmelin, Linn. Syst. Nat. p. 3835. 
1806. Tubularia sultana. ‘Turton, Liun. Syst. Nat. vol. iv. p. 669. 
1816. Naisa sultana. Lamouroux, Pol. flex. p. 224. 
1828. Plumatella gelatinosa. Fleming, Brit. Anim. 
1830. Difflugia proteiformis. Meyen, Isis, 1830, p. 187. 
1834, sae proteiformis. Meyen, Nov. Act. Acad. Czs. Leop. vol, xvi. 
uppl. 
1836. Plumatella sultana, Dumortier, Mém. sur les Pol. comp. fluy. p. 22. 
1838. Plumatella sultana. Johnston, Brit. Zooph. 1st edit. p. 323. 
1838. Fredericella sultana. Gervais, Bull. Soc. Philomat. 1838. 
1839. Fredericella. Van Beneden, Bull. Ac. Brux. tom. vi. 2de partie, 
p: 277. fig. 2. (Original figure.) 
* In my ‘ Synopsis of Freshwater Zoophytes,’ published in the Annals of Natural History, 
1844, I have described as a distinct species with the specific name dilatata, a Fredericella 
in which the branches become dilated towards the extremities; subsequent investigations, 
however, have led me to look upon the F. dilatata of that publication as a merely accidental 
variation of Κ΄, sul¢ana, and I haye accordingly suppressed the species in the present Report. 
