9 
The number of the spines at the upper margin of the aperture 
of the zooecia generally varies between 2 and 3. Sometimes they 
are enormously developed (especially the two at the top ofthe aper- 
ture), sometimes they are short and rudimentary. 
The operculum is generally present; when so, it is small, spine- 
shaped at the base, expanding in a broad round or elliptical lamina 
frequently directed downwards. 
Lateral avieularia commonly present on the two lower zooecia in 
each triplet, anterior avicularia generally present only on the front 
of the terminal zooecium of the triplet, occasionally on the front 
of each cell. Oovecia often ovate. 
Claspers long, usually present on the whole surface of the colony. 
Height variable, frequently about $ inch. Very abundant. 
Localities. Barents-Sea. 
72° 5’ N.lat., 37°57 E. long. 140 fathoms. 
77 N.lat., 45° 48’ E. long. 110 fathoms. 
Habitat. On various Sertularians, Membranipora arctica, Aleyo- 
nidium gelatinosum and Gemellaria loricata (on which the climbing 
state is most evident). 
10a. Menipea ternata var. graecilis. Smitt. 
Besides the normal form of Menipea ternata I found several 
specimens, in which the ordinary triplets of cells are wanting; in 
stead of these the internodes consist of a relatively large number 
of cells (frequently 7) placed in two alternating rows (fig. 1 and 2). 
This form may be considered as the variety gracılis described by 
Smitt (Kritisk Förteckn. öfver Skand. Hafs Bryozoer 1864). 
In consequence of the elongation of the internodes the zoarium 
assumes a more slender appearance. T'he zooecia are of various shape. 
Either they are shorter and less attenuated downwards than in 
the normal form, or they are elongated and narrowed towards the 
base. Opercula are sometimes wanting; when present they are small 
but of the usual form. 
Lateral avicularia generally minute, occasionally large and ofthe 
normal dimensions. Spines on the cells frequently reduced to one, 
