102 REPORT—1862, 
le, or rarely with a short lateral branch ; periderm clothing the stem corrugated, 
dilated at the base of the polype: pale yellowish brown. Polype, when extended, 
about equal to the stem in height; white, with pale ochreous centre; tentacula 
about twenty, confined to the anterior third of the polype. Creeping over the sur- 
face of loose stones in the bottom of arock-pool, Torquay. On stones between tide- 
marks, Dublin Bay. 
Eudendrium humile (mihi). Zoophyte delicate, rising to about 2ths of an inch 
in height, much and vregularly branched; main stems and branches distinctly 
annulated throughout, Polype yellowish vermilion, vase-shaped, with a circular 
groove near its base and a trumpet-shaped proboscis; tentacula twenty or twenty- 
three, with the alternate ones elevated and depressed in extension. Gonophores 
(male) surrounding the body of the polype, and springing each by a short stalk 
from the circular groove which passes round the polype near its base, each gono- 
phone consisting of two superimposed chambers. Female gonophores borne both 
y the base of the polype and by the ccenosare immediately behind it. Rooted to 
the bottom of rock-pools near low-water spring-tides, Torquay. 
Eudendrium vaginutum (mibi). Zoophyte much branched, rising to about an 
inch and a quarter in height ; main stems and branches deeply and regularly annu- 
lated throughout. Polypes vermilion, with about eighteen tentacula, and haying 
. the body, as far as the origin of the tentacula, enveloped in a loose, corrugated 
membranous sheath, which loses itself posteriorly upon the polypary. Gonophores 
not known. In rock-pools at extreme low-water spring-tides, Shetland. 
Perigonimus serpens (mihi). Zoophyte consisting of short, simple, erect stems, 
about 2 lines in height, terminated by the polypes, and rising at short intervals 
from a creeping stolon, which forms an irregular network upon the surface of other 
bodies, the whole of the stems and stolon occupied by a reddish-orange ecenosare, 
and clothed with a delicate transparent periderm, which does not form a cup-like 
dilatation at the base of the polypes. Polypes reddish orange, with about twelve 
or fourteen tentacula, so disposed that in complete extension they are held with 
alternate tentacula elevated and depressed ; body of polype oval, with proboscis coni- 
cal. Gonophores medusiferous, borne by the creeping stolon, and elevated each upon 
a rather long peduncle. Medusoids dome-shaped, with the vertical slightly exceeding 
the transyerse diameter. Manubrium reaching to about one-half the depth of the 
bell, with a simple mouth destitute of tentacula; marginal tentacula two, opposite, 
very extensile, and with large reddish-orange bulbous bases, without evident ocelli, 
the intermediate radiating canals terminating each in a very small bulbous dilata- 
tion. Growing over the stems of Plumularia setacea; dredged from about 12 
fathoms, Torbay. 
Perigonimus minutus (mihi). Zoophyte very minute, consisting of simple stems 
rising to the height of about a line and a half from a creeping stolon, and bearing 
the polypes upon their summit; periderm dilated round the base of the polype. 
Polypes ash-brown, with seven or eight, rarely twelve tentacula, held irregularly 
during extension, and with little or no curvature. Gonophores pyriform, medusi- 
ferous, borne atvarious heights upon the stem, and supported onrather long peduncles. 
Medusoid with the summit suddenly contracted, so as to give a somewhat conical 
form to the umbrella; two opposite radiating canals terminating each in a pale- 
brown bulb which is continued into a very extensile filiform tentaculum, the alter- 
nate two canals terminating each in a much smaller bulb without tentacle ; no 
evident ocellus ; manubrium short, with a four-lobed lip, but without oral tentacula. 
Forming a fringe round the edge of the operculum of Turritella communis dredged 
in Busta Voe, Shetland. Out of between twenty and thirty specimens of living 
Turritelle examined, not one was free from this remarkable little zoophyte. 
Perigonimus muscus (mihi). Zoophyte consisting of numerous erect stems about 
3 an inch in height, not composed of coalesced tubes, springing at intervals from a 
creeping stolon, and sending off short branches, which are themselves, for the most 
part, without further ramification; periderm light brown, slightly corrugated, and 
with a well-marked cup-like dilatation at the base of the polype. Polypes semi- 
retractile, light reddish brown, with about sixteen tentacula directed in extension 
alternately backwards and forwards. Gonophores medusiferous, borne upon a rather 
long peduncle, and springing from the branches at a short distance behind the 
