BRITISH ZOOPHYTES. Ill 



thecae are four-cornered above, with a distinct spine at 

 each of the corners. 



5. D. TAMARiscA^ Linn. Plate VI. fig. 2. 

 Sertularia tamarisca {Linn., Pal., E. and S., Larn.r., 



Lamk, G. J., D. L , R. Q. C, P. H. G., McA.), Dyna- 

 meua tamarisca [Fleni., De B). 



Hab. : Widely distributed. 



This is the " Sea Tamarisk " of Ellis (" Corallines," 

 4), who says, " Its ramifications are irregular, but 

 chiefly alternate ; its texture is of a thin, transparent, 

 horny nature; the denticles or cells are large, cylin- 

 drical, open and opposite, and each pair seems fixed in 

 the top of the next pair below it. The vesicles (gono- 

 thecae) appear to be shaped like a heart with a short 

 tube, not unlike the aorta, cut ofi"." The calycles have 

 tridentate apertures. 



6. D. PiNNATA, Pallas. Plate VI. fig. 3. 

 Sertularia piunata {Pal., G. /., D. L., B. Q. C, P.H. G., 



McA.), S. fuscescens (Tart., Lamx., Stew.), S. nigra 

 (the female) {Pal, G. J., D. L., P. H. G., McA.), 

 Dynamena pinnata {Flem.), Dynamene brunatre 

 {De B.), Diphasia nigra (Ag), Nigellastrum nigrum 

 {Oken). 



Hab. : Cornwall {Pal. and Couch), Devon {Mrs. 

 Griffiths) , Scai-borough {Bean) . Height 7 — 8 in. Stems 

 straight, serrated. Branches alternate, tapering to- 

 wards the point of origin. Calycles subalternate, 

 tubular, with wide margin. Gonothecae ovate, with an 

 aperture surrounded by short teeth. 



" To see this in all its beauty it must be examined 

 in a living state, when, instead of being black (as it 

 becomes when dried) , it will be found to be of a beau- 

 tiful and delicate pink, and in some instances of a deep 



