15 
Genus: Mucronella, Hincks. 
20. Mucronella laqueata. Norman. 
SYNONYMS: 
Lepralia laqueata. Norman. Ann. N.H. Jan. 1864. 85. 
Discopora coceinea form. ovalis (part.) Smitt. (?) 
The marginal spines are short, occasionally two in number. The 
punctures forming a row around the base of the zooecia are not 
large and very distinet. Denticle of remarkable breadth. Zoarium 
inerusting with lateral irregular expansions. Rare. 
Locality: Barents-Sea. 74° 9' N. lat., 45° 2’ E. long, 160 fathoms. 
Habitat: On tubes of Annelids. 
21. Mucronella simplex. Hincks. 
The characters of the present form correspond so completely with 
those of Mucronella simplex recently described by Hincks (Ann. a. 
Magaz. of Nat. History), that I do not hesitate to range it under 
this species. Apertures of the zooecia for the most part orbicular. 
Avicularia are wanting. Rare. 
Locality: Barents-Sea. 74° 9' N. lat., 45° 2’ E. long, 160 fathoms. 
Habitat: Incrusting on stones and Alcyonarians. 
Genus: Eschara, auctt. 
22. Eschara (Flustra) solida. Stimpson. 
SYNONYNS: 
Eschara palmata. Sars. 
Escharella palmota. Smitt. 
This interesting form, characterised specially by its peculiar fibres, 
seems to be rather common in the Arctic seas. The erect zoarium 
consisting of more or less numerous broad laminar branches (gene- 
rally arranged in one plane) varies much in shape and size. Fre- 
quently the branches are long and erect so as to form a slender 
zoarium (Fig. 3a), frequently they are short and spreading forming 
a more compressed zoarium. Öccasionally the colony is composed 
of only one single lamina (fig. 3b). Generally the branches expand 
