41 
covered with fine sand etc. Only few grown-up persons are pre¬ 
sent, while a perfect network of stolons is found. Owing to the 
characteristic shape of the colony and the presence of secondary 
transversal vessels, I do not hesitate to refer these specimens to 
p. reticulata, which has its nearest occurrence at the Magelhaen- 
strait and South Georgia. 
Alloeocarpa Michlsn. 
Alloecarpa affinis n. sp. 
(Plate IV, figs. 1 and 2). 
Locality: Perseverance Harbour, Campbell Island. Ca. 20 
Fathoms. 
The specimens are attached to shell-fragments. Some of them 
are quite isolated, others are adjoining to each other with the 
peripheral zone of the test. 
Others show stages of budding in such a manner that 
buds in different stages of development are seen in connection 
with the specimen, from which they have their origin. The largest 
specimen measures ca. 6 cm in diameter, the baso-apical distances 
are not more than 3—4 mm, often only 1—2 mm. In shape it is 
circular or a little oblong. In the young siphons are not seen, 
while the oblong or slit-shaped body-apertures in the older persons 
are situated on small eminences. 
The young specimens (in a preserved State) are of a dark steel- 
blue colour, the older ones are greyish. A striking feature, especially 
in the smaller specimens, is the occurrence of numerous m antle¬ 
ve ssels in the pellucid, peripheral part of the test. They appear 
as club-shaped, dark bodies radiating from a centre, apparently 
situated in the basal wall of the animal. These formations have 
been described by Michaelsen (1900, p. 33), and described and 
pictured by Sely s-Longchamps (1913, p. 44 — 47). 
The ten ta cl es are present in a number of about 20, seven 
of which are larger than the rest. Parasitic Protozoa (Suctoria?) 
are found attached to the tentacles. 
The dorsal tubercle is a simple slit. 
The dorsal lamina is a plain membrane. 
The branchial-sac has no folds, but 6 internal longitudinal 
vessels on each side. Transversal vessels of lst and 2nd order as 
