80 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



dead shells more or less covered with encrusting Polyzoa, 

 with the following results : — 



Off South end of Isle of Man, from 15 to 30 fathoms : — 



Hydrold Zoophytes. — Hydrallmania falcata, Obclia 

 geniculata, O. dichotoma, Halecium Beanii, H. tenelkm, 

 Diphasia rosacea (beautiful colonies), I), attenuata, Filelliun 

 serpens (in large quantities on stems of Sertularia abietina, 

 ike), with among it "'Coppinia arcta " of which Professor 

 Nutting has recently given us the history.* 



Calycella syringa, Clytia johnstoni (beautiful colonies 

 with gonothecae), Opercidarella lace rata, Bougainvillia 

 muscus, Bimeria eestita, Campamdaria hincksli, C. volubilis, 

 C. verticillata, Sertularia abietina, S. argentea, S. operculata 

 Sertularellapolyzonias, S. tenella, Lafoea dumosa, L.frnticosa, 

 Eudendrium capillare, Antennidaria ramosa, Plumularia 

 catharina, P. setaeea, CuspideMa costata. 



Polyzoa. — Gellepora avicidaris, C. costazii, ('. dichotoma, 

 Eueratea chelata, Bieellaria ciliata, Beau i a mirabilis, Scrwpo- 

 cellaria reptans, S. scruposa, Pedicellina cernua, P. gracilis, 

 Crista ebnrnea, C. denticulata, Membranipora pilosa, M. cate- 

 nidaria, Idmonea serpens, Cellar ia fistidosa, Lichenopora 

 hispida, Chorizopora brongniartii, Bowerbankia imhricatu .. 

 Buskia nitens, Cylindroecium pusillum, Stomatopora johnstoni, 

 /Etea recta, JE. anguina, Porella concinna, Valkeria uva. 



The Zoophytes and Polyzoa of the preceding lists are 

 in some cases crowded upon one another in wonderful 

 profusion. On one piece of Hydrallmania falcata, 5 inches 

 in height, were 14 other species belonging to 13 genera, 

 and on one little piece of Sertularia argentea only two inches 

 in height, were 12 other species representing no less than 

 12 genera, 5 of them Hydroids, and 7 Polyzoa. 



* Hydroida from Alaska and Puget Sound, 1899, ending by 

 establishing it, as not an independent hydroid species, but as the 

 gonosome of species of Lafoeidae — in this case, therefore, probably, of 

 Filellum serpens. 



