11 
1la. Bugula Murrayana. var. fruticosa. Packard. 
Chiefly characterised by its narrow segments. Spines at the upper 
angles of the zooecia very short. 
Here and there (but rarely) a marginal avicularium, not so dis- 
tinetly bird’s-head shaped as in the normal form. Height } to 1 inch. 
Locality ? 
Habitat? 
Family FLUSTRIDAE. 
Genus: Flustra, Linnaeus. 
12. Flustra membranaceo-truncata. Smitt. 
SYNONYMS: 
(?) Flustra papyracea. Sol., auett. 
(?) Flustra chartacea. Gmel. auctt. 
Zooecia for the most part rectangular ; spines are generally wan- 
ting. The membranous processes originating from the back of the 
cells are present. One minute specimen only. 
Locality ? 
Habitat: On Sertularians. 
Family MEMBRANIPORIDAE. 
Genus: Membranipora, Blainville. 
43. Membranipora arctica. a’Orb. 
SYNoNnYMS: 
Semiflustrellaria arctica. d’Orb. mserpt. 
Zoarium generally creeping, occasionally erect forming irregular 
The aperture of the large zooecia usually rather ovate 
expansions. 
Spines are wanting. Avicularia large on the frontside 
than oval. 
of the ooecia. Abundant. 
Locality: Barents-Sea. 72° 5’ N. lat., 37°57' E.long, 140 fathoms. 
74° 0',5 N. lat., 37° 31',5 E. long, 124 fathoms. 
Matotschkin-scharr. 73° 25’ N. lat., # 55° E. long, 10 fath. 
Habitat: On Aseidians, Campanularidae, shells and stones. 
