24 
MARINE FAUNA OF ST. ANDREWS. 
length of the cup, and the small number of teeth are the 
characteristic features. Specimens which resemble Clytia 
Johnstoni occasionally grow in proximity; and some interme¬ 
diate forms occur. 
Genus Gonothyrcea, Allman. 
Gonothyrcea Loveni , Allman; Hincks, Brit. H. Z. 
yoI. i. p. 181. 
Abundant on Sertularia abietina and Diphasia rosacea from 
deep water. The exceeding delicacy of the free margins of 
the hydrothecae, even in good spirit-preparations, renders it 
difficult to say whether they are (or were) notched or smooth. 
It was only by a comparison of observations on many examples 
that the peculiar crenations were understood, as none showed 
more than a few, and the majority none at all. The appear¬ 
ance of the gonothecae, however, is characteristic. 
Gonothyrcea gracilis , Sars ; Hincks, Brit. H. Z. vol. i. p. 183. 
Plentiful on Tubularia indivisa , from deep water, amongst 
Clytia Johnstoni, on the tests of Ascidia sordida , on Scalpellum 
vulgare , Stenorhynchus rostratus , and CeUepora pumicosa. 
The capsules are large, translucent, and borne on a ringed 
stalk. Growing as this did amongst C. Johnstoni , it at first 
seemed to be a branched variety of the latter ; but the peculiar 
nature of the branching and the structure of the gonothecae, 
which were chiefly borne on the stems, distinguished it on closer 
scrutiny. Moreover the hydrothecae of this species, contrasted 
with C. Johnstoni , are much larger and deeper. 
Fam. 2. Campaimlmidae. 
Genus Opercularella, Hincks. 
Opercularella lacerata , Johnston ; Hincks, Brit. H. Z. 
vol. i. p. 194. 
Abundant on the stems of Plumularia pinnata , Ohelia lon- 
gissima , and other zoophytes, and amongst Clytia Johnstoni 
on the stems of Laniinarice ; Prof. John Reid also found it on 
Scrupocellaria scruposa. This species presents two well- 
marked varieties, which occur together on the same stem:— 
