24 MARINE FAUNA OF ST. ANDREWS. 



length of the cup, and the small number of tooth arc tin- 

 characteristic features. Specimens which resemble Clytia 

 Johnstoni occasionally grow in proximity ; and some interme- 

 diate forms occur. 



Genus (ioxoTHYR.tA, Allman. 



Gonothyrcea Lovini, Allman ; Hincks, Brit. II. Z. 

 vol. i. ]>. 181. 



Abundant on Ser tularin ablet! nn and Diphasia rosacea from 

 deep water. The exceeding delicacy of the free margins oi 

 the hydrothecse, even in good spirit-preparations, renders it 

 ditlicult to say whether they are (or were) notched or smooth. 

 It was only by a comparison of observations on many examples 

 that the peculiar erenations were understood, as none showed 

 more than a few, and the majority none at all. The appear- 

 ance of the gonothecrc, however, is characteristic. 



Gonothyraa gracilis, Sars ; Hincks, Brit. II. Z. vol. i. p. 183. 



Plentiful on Tubularia Indlvlsa, from deep water, amongst 

 Clytia Johnston!, on the tests of Asci'Jt'n so,-J!Jfi, <>n Seu//>eUiau 

 vulgare, Stenorhynchus rostratti*, ami Cellepora pumicosa. 

 The capsules are large, translucent, and borne on a ringed 

 stalk. Growing as this did amongst C. Johnston!, it at first 

 seemed to be a branched variety of the latter ; but the peculiar 

 nature of the branching and the structure of the gonothecas, 

 which were chiefly borne on the stems, distinguished it on closer 

 scrutiny. Moreover the hydrothecae of this species, contrasted 

 with G. Johnstoni, are much larger and deeper. 



I'am. 2. Campanulinidae. 

 Genus OPERCULARELLA, Hincks. 



Opercularella lacerata, Johnston ; Eincks, Brit. II. X. 

 rol.i. p. 194. 



Abundant on the stems of Plumularia pinnata, Obelia 

 gissima, and other zoophytes, and amongst Glytia Johnston! 

 on the stems of LaminaricB] Prof. John Reid also found it on 

 ScrupoceUaria scruposa. This species presents two well- 

 marked varieties, which occur together on the same stem : — 



