236 Transactions. 
Hydrothecae slender, upper one-third with several folds or irregular 
converging segments; a distinct diaphragm at base. 
onosome ? 
Loc.— Hull of ‘Terra Nova'" (D. С. Lillie). 
In this delicate species pedicels average about 0:27-0:30 mm. in length, 
and hydrothecae range from about 0-20mm. to 0-30 mm. There is much 
variation in undulation of pedicels, some being smoother than others; 
generally undulations are fainter in distal portions. Abrupt divisions may 
Ето. 5.—Campanulina humilis n. sp. X 40. 
be seen occasionally, indicating where regenerations have occurred. No con- 
striction between hydrothecae and pedicels, which slightly enlarge and join 
hydrothecae without interruption, so it would be impossible to say where 
hydrothecae begin if it were not for diaphragm. The latter is extremely 
thin, and the perisarc throughout is of the thinnest. 
n the only specimen all the hydranths were retracted, so І could not 
ascertain whether the tentacles were webbed, as is usual in the genus. 
Thyroscyphus simplex (Lamouroux). 
My кз Fes CN Ies] 
a 
1 
& 
aw 
= 
© 
= 
sS 
T 
e 
[2] 
Parascyphus simplex Ritchie, 1911, p. 160. 
Thyroscyphus simplex Bale, 1915, p. 245 (synonymy). 
Recorded by Hartlaub from French Pass, and by Ritchie from the 
British coast and the South Atlantic. 
Fam. SERTULARIIDAE. Iw 
Of the genera here included in the Sertulariidae, Thuiaria and Sertu- fe 
larella are taken according to Levinsen’s definitions. I do not, hows "dd 
adopt his genus Odontotheca, as its characters appear to me insufficient 8 
warrant its separation from Sertularia. Levinsen himself, though classing — 
8. minima as an Odontotheca (1913, p. 308), states on p. 264 of the same 
work that it is a true Sertularia. All the other Sertulariae mentioned in 
the present paper would come under the Odontotheca of Levinsen. +, 
The species with six or more teeth on thecostome, and, so far as 15 — 
known, without operculum, are referred to the genus Stereotheca, under 
Synthecidae. E 
