BRITISH ZOOPHYTES. 113 



larian bear two calycles, it is an internode of the first 

 order ; if it bear four, of the second order ; and so on. 

 lu 8. 'pumila and in the next species, 8. gracilis, the 

 internodes are of the first and second orders. 8. pumila 

 is often found branched, and in that case may grow to 

 an inch or more in height. This species is the " Sea- 

 oak Coralline " of Ellis (" Corallines/^ 9), so called 

 from being found by him on the sea-oak /zicits. It is 

 one of the phosphorescent species, this quality having 

 been noticed by nearly all zoophytologists. 



2. S. GRACILIS, Has. 



S. pumila, var. /3. (/. G.). 



Hab. : Brighton {Eas.), Norfolk [G. W. P.), Swanage 

 Bay {T. H.), Durham, Shetland (Nor.), Blackpool, 

 Bangor {A. 8. P.). Height ^ in. 



This has generally been considered a dwarf variety 

 of the preceding. G. Winther has recently argued in 

 favour of this view.* There appears to be little 

 difference between the species, the present one being, 

 however, smaller and with more slender and lengthened 

 internodes than 8. pumila. 



3. S. OPERCULATA, Linth. Plate VII. fig. 3. 



S. usneoides (Pal.), Dynamena operculata {Lamx., 

 Flem.y Be B.), D. pulchella {B'Orh.), Amphesbetia 

 operculata {Ag.). 



Hab.: Generally distribu.ted. Height several inches. 



This species is exceedingly graceful and beautiful. 

 " Sea Hair ^' was the name which Ellis gave to it, and 

 well does it express its delicate habit and growth. The 

 gonothecae are profusely distributed over the zoophyte, 

 and reminded the early naturalists of the capsules of 

 mosses, and, says Dr. Johnston, induced '' the botanists 

 * See J. R. M.S., 1880,462. 



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