50 NATURAL HISTORY OP 



Hab. : Firtli of Forth^ Durham. Height ^ in. Stems 

 slender^ sparingly branched and indistinctly annulated. 

 Polypites pale rose colour. 12 — 16 tentacles. Gono- 

 phores developed among the tentacles. 



3. S. GEAVATA, T. S. W. 



Coryne gravata (T. 8. W., McA.'), Sarsia and Coryne 

 mirabilis {Ag.)/^ Tubularia stellifera {Couth). 



Hab. : North Berwick, Filey Brigg. Height \ in. 

 Stem smooth and slender. Polypites colourless, small, 

 ■with 10 — 12 short tentacles. A peculiarity about them 

 is that the heads of the polypites often disappear, leav- 

 ing the stalk with one or two medusiform gonozooids. 



On Plate X. of Hincks' "British Hydroid Zoo- 

 phytes," are figured the different forms and stages of 

 this species, which show the atrophied forms of the 

 polypites very distinctly. 



This species has been very fully investigated by 

 Agassiz, both in its complete form and its embryo 

 stages. 



4. S. DECIPIENS, Buj. 



? Laomedea pulchella {McA.). 



Hab. : Firth of Forth {T. 8. W.). 



This is a species little known. The peculiarities of 

 the polypite are the possession of a prominent trumpet- 

 shaped proboscis and the small number, 8 or 9, of its 

 tentacles. Prof. Allman, however, excludes this from 

 the British species. 



5. S. PULCHELLA, All. 



Hab.: Skelmorlie, Firth of Clyde {All). Height 

 ^ in. Polypite deep orange. Tentacles 15 — 20. 

 This species is described by its discoverer. Prof. 



* Prof. Allman treats this as a separate species, not included 

 amongst the British fauna (G. H., 278). 



