THE HYDROID FAUNA OF THE WEST OF SCOTLAND 31 



LOCH ETIVE, 70 fms.., on Hydrallmania falcata. 

 LOCH BUY, 9-15 fms., on Sertularella gayi. 



21. THAUMANTIAS INCONSPICUA, Forbes. 

 (CAMPANULARIA RARIDENTATA, Alder.) 



The specimens from all the localities, except the last mentioned, 

 differed from Hincks's examples in having their stems wholly 

 ornamented with rings which varied in definiteness in different 

 specimens. 



CLYDE SEA AREA. SOUND OF SANDA, 22 fms., r.r., on Thuiaria 



lonchitis. 



FIRTH OF LORNE, 30-110 fms., on Spider-crab; 50-70 fms. 

 LOCH BUY, 9-15 fms., on Sertularella gayi. 

 BETWEEN CANNA AND RUM, on Diphasia pinaster. 



22. OBELIA DICHOTOMA (Linn.). 

 CLYDE SEA AREA off Cumbrae Is., 15 fms. (M.). 



23. OBELIA GENICULATA (Linn.). 



CLYDE SEA AREA. LOCH LONG, low water (M.). LOCH STRIVEN, 

 low water (M.). ARRAN BASIN Kilbrennan Sound, 10-15 

 fms., on Thecocarpus myriophyllum. 



24. OBELIA LONGISSIMA (Pallas). 



CLYDE SEA AREA. BARRIER PLATEAU between Sanda Is. and 



Ailsa Craig, 24 fms. 

 FIRTH OF LORNE, 30-50 fms. 



25. GONOTHYR^EA GRACILIS (Sars). 



FIRTH OF LORNE, 60-80 fms., 4 rings below hydrotheca, instead 



Of 2. 



26. GONOTHYR^EA HYALINA, Hincks. 



Nutting observed on clumps of G. hyalina and G. loveni, obtained 

 near Plymouth, specimens which showed complete intergradation 

 between what he regarded as almost typical forms of the two species ; 

 and he has recorded his opinion that " there is a strong probability 

 that these two so-called species are but varieties of one form, which 

 should bear the name of G. loveni, Allman." * I have kept the two 

 forms separate, however, awaiting further evidence of their specific 

 identity. 



1 Nutting, "Nat. Hist. Bull." S.U.I., vol. iv., 1896, p. 3. Reprinted from 

 "Journ. Mar. Biol. Ass." vol. iv., 1896, pp. 146-154. 



