‚148 
mit of a simple rooted hydrocaulus ; both hydrocaulus and hydro- 
rhiza invested by a very delicate periderm ; polypites flask-shaped, 
with two sets of filiform tentacles, a proximal set longer and thi- 
cker, and arranged in a single verticil near the base of the poly- 
pite, and a distal set shorter and thinner, and scattered over a 
zone close to the summit of the polypite. Gonophores adelocodo- 
nic, on simple or branched peduncles, which spring from the body 
of the polypits at the distal side of the longer tentacles. 
Gonothyraea Allm. Hydrocaulus branching, rooted by a 
filiform hydrorhiza; hydrotheca bell-shaped, with entire or serrated 
margin, and destitute of operculum ; tentacula surrounding the base 
of a large, very contractile metastome. Gonophores adelocodonie. 
Sporosacs in the form of imperfect Medusae (meconidia), carrying 
round the rudimental codonostome a cirele of filiform tentacula, and, 
when mature, supported on the summit of the gonangium, where 
they lie entirely external in its cavity. 
Leptoscyphus Allm. Hydrocaulus simple or branching, 
attached by a creeping filiform hydrorhiza; hydrothecae with an 
operculum composed of converging lanceolate segments. Polypites 
eylindrical when extended; tentacula surrounding the base of a co- 
nical metastome. Gonophores phanerocodonie. Umbrella, at the time 
of liberation, deep bell-shaped or coniecal; manubrium pendent 
from a conical projection from the roof of the umbrella, of mode- 
rate size, with the mouth surrounded by four short capitate tenta- 
eula; radiating canals four, each terminating distally in a bulk, 
without evident ocellus, each bulb giving origin to a cluster of two 
or three tentacles; a single marginal tentacle with a bulbous base 
is also developed from the centre of each interradial space. 
Den auf diese Arbeit bezüglichen Nachträgen (l. c.) entneh- 
men wir die Notiz, dass Verf. den Namen Heteractis — weil schon in 
der Botanik vergeben — in Heterostephanus verwandelt wissen 
will. Für Candelabrum wird die Sars’sche Benennung Myriothela 
restituirt, unter der uns zum ersten Male eine richtige Darstellung 
vom Baue und der Natur des betreffenden Thieres geboten wurde. 
Auch die systematische Stellung des Thieres wird verändert; es 
dürfte eher den Tubulariden als den Coryniden zugehören und am 
besten neben Acaulis einzuschalten sein. 
Ebendas. (p.57—61) giebt Allman auch noch die Beschrei- 
bungen einiger neuer Arten (Perigonimus vestitus, Bougainvillia fru- 
ticosa, im Hydroidzustande nahe mit B. ramosa verwandt, Tubula- 
ria humilis, T. attenuata und Campapulina repens), so wie Beschrei- 
bung und Abbildung des schon eben charakterisirten Gen. Hetero- 
cordyla. In Betreff der von Coryne implexa aufgeammten Zanclea 
