Ma CLASS IT. 
Halodactylus Farrer. Polypary fleshy, gelatinous, pellucid. 
Polyp with tentacles 12—16, often longer on one side. 
Sp. Halodactylus diaphanus Farrn, Alcyon. gelatinosum L., Eu. Corall. 
Pl. xxxur. fig. d, Esper, Pflanzenth. Alcyon. Tab. xvitt., FarrE Phil, 
Trans. 1837. Pl. xxv, XXVI.; VAN BENEDEN Rech. sur les Bryozoaires 1. 1. 
Pl. v. fig. 1, 2; eccurs on our coast (Dutch), adhering to marine plants 
and shells resembling a gelatinous, transparent, tubular, and irregularly 
branched sea-weed. 
Family XV. Lophopoda Dumortigr s. Cristatellina. Tentacles 
set pectinately on two arms, numerous. 
Cristatella Cuy. Polypary free, disciform, polypiferous on the 
margin. 
Sp. Cristatella mucedo Cuv., Cristat. vagans LAM., Rors. m1. Suppl. Tab. 
X01; in fresh water; three, four, or more Polyps. are seated in a freely- 
swimming Polypary. GERVAIS and TuRPIN have figured the egg, which is 
provided with tubular spines terminating in two or more hooks ; it bursts 
into two valves, when the young animal is born. See Ann. des Sc. nat. ze 
Série, vit. Zool. pp. 65—93. Pl. ut. Pl. 11. A. Jounston, Hist. Br. Zooph. 
p- 389. 
Plumatella nob. Polypary affixed, tubular, with extremities of 
tubules retractile, polypiferous. 
Plume-Polyps (Polypes & pannache Tres.) Comp. Mémoire sur 
Tl Anatomie et la Physiologie des Polypiers composés deau douce 
nommés Lophopodes, par B. C. Dumortier. Tournay 1836. 8vo. 
(published in part at an earlier date in the Bulletin de Acad. des 
Sc. de Bruwelles 1835, p. 422 &c.) Propagation occurs by eggs and 
buds. TREMBLEY also observed spontaneous’fission of the Polypary: 
in Plumatella cristata. 
Plumatella Lam. Naisa Lamour. Stem branched or lobate. 
Sp. Plumatella cristata Lam.; TremB, Polyp. Tab. x. f. 8, 9; the body 
transparent, 1” long, the plume nearly of the same length; about sixty 
tentacles ; it lives in fresh water beneath Lemna. 
Plum. campanulata Lam. Ross. Ins. T. 11. Suppl. Tab. 73—75. (Lin- 
NXUS united this species with the former, under the name of Tubularia 
campanulata.) Probably Plumatella repens LaM., SCHAEFFER Armpo- 
lypen 1754 (2nd edit. 1763). Tab. 1. fig. 1, 2, ErcHHORN Wasserthiere. 
1781. Tab. Iv. p. 43 (der Polyp mit dem Federbusch), is only a variety 
of this. According to NoRDMANN, the tube continues to grow for some 
time after the death of the Polyp. When full-grown it has up to sixty ten- 
tacles, but in young animals they are less numerous, shorter and thicker. 
