147 
eine Acroeyste entleert wird), Campanulina van Ben. (2 Arten mit 
freien Geschlechtsth.) 
2. Fam. Aequoridae. Zygodactyla Brdt. (Z. vitrea Gosse, die 
einzige Aequoride bekännter Abstammung.) 
3. Fam. Thaumantidae. Thaumantias Gegenb. (Th. incon- 
spieua Forb., deren Hydroidzustand nach Wright mit Campanu- 
laria raridentata Ald. nahe verwandt ist.) 
4. Fam. Leptoseyphidae Leptoscyphus n. gen, (L. tenuis 
All. mit Lizzia-artigen Medusen), Lafo&a Lam. (4 Arten mit freien 
Geschlechtsth.) 
5, Fam. Lineolaridae. Lineolaria Hincks (1 Art mit noch 
unbekannten Geschlechtsth.). 
Als Probe der von unserem Verf. geübten Behandlung lasse 
ich hier die Diagnosen der neu aufgestellten Genera folgen. (Ueber 
die Terminologie des Verf. vgl. die früheren Berichte.) 
Rhizocline Allm. Coenosarc forming an adherent stratum 
supported by a solid chitinous expansion. Polypites developed at 
intervals from the free surface of the coenosarc; tentacles filiform, 
in a single verticil round the base of a conical metastome. Gono- 
phores phanerocodonic, sessile on the free surface of the coenosare. 
Umbrella, at the time of liberation, deep bell-shaped; manubrium 
large, with a four-lipped mouth, but not extending beyond the 
margin of the umbrella; four radiating canals continued distally by 
four marginal tentacles with bulbous bases; three shorter tentacles 
developed in each interradial space. 
Heteractis Allm. Polypite solitary, born on the summit 
of a simple rooted hydrocaulus; two verticils of tentacles, a proxi- 
mal and a distal; the tentacles composing the proximal verticil long; 
and annulated, those composing the distal verticil short and capitate. 
Gonophores phanerocodonie, borne upon peduncles, which arise from 
the body of the polypite at the distal side of the proximal verticil 
of tentacles.. Umbrella in the form of a shallow bell, with four ra- 
diating canals, one large marginal tentacle and three rudimen- 
tal ones. 3 
Heterocordylus Allm. Coenosare consisting of a simple or 
branched hydrocaulus, which arises from a creeping, filiform and ana- 
stomosing hydrorhiza, the whole invested by a chitinous periderm. 
Polypites fusiform, with a single vertieil of filiform tentacula round 
the base of a conical metastome. Gonophores adelocodonie, borne 
by gonoblastidia, which are depeloped (solely?) from the hydrorhiza; 
sporosaes of the ordinary kind; destitute of tentacles and cilia and 
- incapable of locomotion. 
Monocaulos Allm. Polypite solitary, borne on the sum- 
