BRITISH ZOOPHYTES. 109 



Described in the Ann. of Nat. Hist, (ord ser.), viii. 

 253. "' Its nearest ally is 8. tenella. It is one of the 

 company of pigmy forms, as exquisite as they are 

 minute, which reward a diligent search amongst the 

 chinks and crannies of the tidal pools.'^ 



Genus II. Diphasia, Agassiz. 



Zoophyte plant-like. Stem more or less branching, 

 rooted by a creeping stolon. Calycles opposite, a pair 

 in each interuode, occasionally subalternate, with an 

 internal valve- like operculum. Gonojphores scattered, 

 more or less cleft or divided into segments. — T. H. 



1. D. ROSACEA, Linn. 



Sertularia rosacea {Linn., Esp., E. and 8., Lamk., 

 Temp., G. J., R. Q. C, D. L., P. H. G., McA.), S. 

 nigellastrum {Pal.), Dynamena rosacea {Lamx., Flem., 

 BeB.). 



Hab. : Generally distributed. Height from 1 — 2 in. 

 Stem whitish, branches alternate. Calycles tubular, 

 with a free portion standing out from the stem. Fe- 

 male gonothecae pear-shaped, with "8 longitudinal 

 ridges terminating in spinous processes of various 

 lengths.^' This species is parasitic on fuci and zoo- 

 phytes, and is said to be more graceful on the latter 

 than on the former. 



This is the " Lily or Pomegranate Flowering Coral- 

 line'' of Ellis ("Corallines," 8). He says of the 

 gonothecae that " when magnified they are shaped like 

 a lily or pomegranate flower just opening, and appear 

 more like a blossom than any belonging to the whole 

 tribe of corallines." 



2. D. ATTENUATA, HincJcS. 



