ON FRESHWATER POLYZOA. 335 
2. Plumatella stricta *, Allman. 
Spec. Char.—Ccencecium adherent, creeping. Cells cylindrical, narrow, not 
furrowed or carinated. Ova narrow. 
SyNonyM. 
1848. Plumatella repens. Van Beneden, Recherches sur les Bryoz. Fluv. 
de Belg. p. 21. pl. 1. fig. 1-4, Mém. de l’Acad. Roy. de Belg. 1848. 
(Original figure.) 
Distribution.—Belgium. 
3. Plumatella punctata, Hancock. 
Spec. Char.—Ccencecium adherent, creeping, irregularly branched ; branches 
composed of a series of large conical cells tapering towards the orifice, 
destitute of a furrow, the upper portion of the cell almost colourless, and 
freckled with minute opake white spots. Tentacula about 60, calyciform 
membrane distinctly festooned. Ova broad. 
SyNonyM. 
1850. Plwmatella punctata. Hancock, Ann. Nat. Hist. 2nd series, vol. v. 
p- 200. pl. 5. f. 6, 7, and pl. 3. f.. 1. 
Distribution.— England. 
4. Plumatella fruticosa, Allman. , 
Spec. Char.—Cceneecium irregularly branched, attached only at its origin; 
cells cylindrical, destitute of furrow, but obscurely keeled. Ova narrow. 
Synonyms. 
1844. Plumatella fruticosa. Allman, Ann. Nat. Hist. vol. xii. p. 330. 
1846. Plumatella fruticosa. Allman, Proc. Roy. Irish Acad. ann. 1846. 
1847. Plumatella fruticosa. Johnston, Brit. Zooph. 2nd edit. p. 404. 
Distribution.—Ireland- 
5. Nova species. Plumatella coralloides, Allman. 
Spec. Char—Cceneecium attached only at its origin, and forming dense 
erect tufts of dichotomously branched tubes, destitute of furrow and keel. 
Tentacula about 60. Ova broad. 
Distribution — England. 
6. Plumatella emarginata, Allman. 
Spee. Char.—Ceeneecium adherent, creeping ; cells cylindrical, with a very 
distinct furrow, which gives an emarginated appearance to the orifices, and 
becomes continuous below with a prominent keel. Tentacula about 40. 
Ova narrow. 
- SYNONYMS. 
1804. Tubularia repens?. Vaucher, Bull. de la Soc. Philom. ann. xii, No. 81. 
pl. 19. F. 1, 2, 3, 9, 101. 
1816. Plumatella repens?. WLamarck, An. sans Vert. Ist edit. vol. ii. p. 108. 
1324. Naisa repens Ὁ. Deslongchamps, Encyc. Méth. 1824. Zooph. p. 561. 
1836. Plumatella repens Ὁ. Lamarck, An. sans Vert. 2nd edit. vol. ii. p. 123. 
1844. Plumatella emarginata. Allman, Ann. Nat. Hist. vol. xii. p. 330. 
1847. Plumatella emarginata. Johnston, Brit. Zooph. 2nd edit. p. 464. 
Distribution. —France ἢ, Ireland. 
* This species, the only freshwater Polyzoon not hitherto found in Britain, has been 
formed for the P. repens of Van Beneden, which, as has already been said, does not cor- 
respond with the true Twdularia repens of Miiller. 
+ See page 332. 
